After losing the 2020 Indy 500 to Takuma Sato, Dixon took his revenge at Gateway by holding off the charging Japanese driver to secure his 50th career win and join an exclusive club occupied only by AJ Foyt (67) and Mario Andretti (52).
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Dixon continued his unbeaten start to 2020 at Road America as slow pitstops accounted for Penske rivals Josef Newgarden and Power.
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Dixon made an aggressive fuel strategy work by carving his way through the field to win the second round of 2020 on the Indianapolis road course by 19s from Graham Rahal.
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Following the lengthy COVID-19-induced delay to the 2020 season, Dixon dominated the first race of the new aeroscreen era to win at Texas, while closest challenger Rosenqvist crashed late on.
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Under pressure from rookie team-mate Felix Rosenqvist, Dixon scored his sixth win at Mid-Ohio in 2019 to keep himself in the frame for the title, but a mixed end to the year meant he could only end the year fourth.
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Dixon made up for crashing out of the first Detroit race in 2019 - his first DNF since Texas 2017 - by winning the second from Marcus Ericsson, making a two-stop strategy work instead of the conventional three-stopper.
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Dixon extended his points lead with a third victory at Toronto in 2018, a year that would yield his fifth IndyCar title. Closest rival Simon Pagenaud finished over five seconds in arrears.
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Dixon survived several late restarts for his second win of 2018 at Texas, which put him into the lead of the points race ahead of Andretti Autosport rival Alexander Rossi.
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Dixon had been a picture of consistency in the early stages of the 2018 IndyCar season, but took until round seven at Detroit before he finally won, seeing off the challenge of Ryan Hunter-Reay.
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Back with Honda engines after three years with Chevrolet, Dixon took his one and only win of 2017 at Road America, outfoxing four Penske cars in another demonstration of his fuel strategy prowess.
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From pole, Dixon took his second and last win of an off-colour 2016 at Watkins Glen, leading all but 10 laps during pit cycles. He would end the year sixth in points, the first time since 2005 he'd finished outside the top four.
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On IndyCar's first visit to Phoenix since 2005, a dominant Dixon led 165 laps to tie with Al Unser for fourth on the all-time winners list on 39.
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A clash between Montoya and Power in the double points 2015 decider at Sonoma gave Dixon the initiative for an unlikely fourth IndyCar title, on countback from season-long leader Montoya. It sparked scenes of jubilation in the Ganassi camp as Dixon - and Chip Ganassi himself - both crowdsurfed.
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Running a high-downforce aero set-up proved crucial to Dixon's second win of 2015 at Texas as he headed Kanaan in a Ganassi 1-2. It put him firmly in the mix for the title with Indy 500 winner Juan Pablo Montoya and Power.
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Dixon's 2015 title bid got off to a poor start at St. Pete and NOLA, but he put matters right by winning round three at Long Beach - putting him ahead of Bobby Unser on the all-time US open-wheel winners list in fifth overall. It took a bit of luck - as team-mate Kanaan pulled into his pit box, it delayed race-leader Castroneves enough for Dixon to emerge ahead into a lead he wouldn't concede.
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An under-the-weather Dixon took his second win of 2014 in a fuel strategy race at Sonoma, passing Mike Conway three laps from home.
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The now three-times champion had a disappointing title defence in 2014 and when victory came, it was predictably at Mid-Ohio. But it took a Herculean effort to come from last after a qualifying spin docked him of his two fastest laps, and superior fuel mileage to anything his rivals could eke out. It was the first win for the Ganassi-Chevrolet partnership after eight years with Honda.
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After two tough races at Sonoma and on the streets of Baltimore, Dixon responded with an important victory in the first of two Houston races as gearbox problems ended Castroneves' record of completing every lap in 2013. More gearbox woes for the Brazilian in the second race put Dixon in the pound seat for his third title, although that was overshadowed by Franchitti's career-ending accident.
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Dixon completed a clean-sweep of Toronto and a hat-trick of victories to move into second in the 2013 standings and apply pressure to points leader Castroneves, who finished second.
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Dixon's 2013 title push found another gear on the streets of Toronto. He took his second consecutive victory by passing Sebastien Bourdais seven laps from the end.
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Dixon led a Ganassi 1-2-3 as the series returned to Pocono in 2013, with Charlie Kimball and Franchitti rounding out the podium.
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Dixon's Mid-Ohio happy hunting-ground delivered for him again in 2012. The Kiwi stretched his fuel stints and jumped erstwhile leader Will Power at the final stops for his fourth win in six years at the track.
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After a two-hour delay while the crumbling Detroit track surface was repaired, Dixon took his first win of 2012 and his first of the new aerokit era.
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On IndyCar's one and only visit to the Motegi road course in 2011, Dixon scored a crucial victory over Power - Franchitti's title rival - as the Scot could only manage P8. When Power tangled in the pits with Ana Beatriz next-time out at Kansas, it gave Franchitti the title.
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Dixon's third win at Mid-Ohio in 2011 came in crushing style after passing Franchitti on-track. "Sorry to make it so boring," he said afterwards.
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As Will Power's crash handed Franchitti a third title, Dixon took his third win of 2010 in Miami with a measured drive to beat Danica Patrick and Tony Kanaan.
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Dixon had to wait until July for his second win of 2010, which came in controversial circumstances at Edmonton when a furious Castroneves was penalised for blocking.
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Dixon repeated his 2009 Kanas victory the following year, leading Franchitti in a Ganassi 1-2 finish.
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Dixon reclaimed the lead in the 2009 standings with one race to go after winning at Motgei when Briscoe spun exiting the pits, but could only finish third in the Homestead title decider and narrowly missed out on the title to Franchitti.
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Dixon's winning margin over Penske title rival Ryan Briscoe at Mid-Ohio in 2009 was a dominant 29s - almost unheard of in US open-wheel racing.
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Dixon's 2009 victory from Franchitti in a bore-fest at Richmond was his 19th in IRL-sanctioned competition, equalling Sam Hornish's record.
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An opportunistic move in traffic on Ryan Briscoe helped Dixon to his second win of 2009 at Milwaukee and put him in the lead of the points standings.
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Following a disappointing start to the 2009 season that left him 17th in the points, Dixon kick-started his season with victory at Kansas - helped by a well-timed caution caused by a crash for series returnee Franchitti, now his Ganassi team-mate after an unsuccessful NASCAR stint.
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Fuel - or rather lack of it - was again a decisive factor at Kentucky as Dixon took advantage of Castroneves running out of gas on the final lap to win for a sixth time in 2008, a decisive moment in his second title campaign.
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On his first visit to the Edmonton airport circuit, Dixon used superior fuel-saving to jump main championship rival Helio Castroneves and take his fifth win of 2008.
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Dixon's third win at Nashville in as many seasons continued his strong form in the 2008 title race. On this occasion he was somewhat fortunate, as a missed call to pit played in his favour when rain brought the race to an early conclusion.
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Dixon's 2008 title season continued its strong momentum with a third victory of the season at Texas, winning under caution from Helio Castroneves after a crash involving Ryan Hunter-Reay and Marco Andretti.
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Dixon was dominant on his way to his first and, so far, only Indy 500 win in 2008. Echoing the 2020 race, he led more than half of the total distance to beat Vitor Meira by a little over a second.
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Dixon made up for his 2007 title heartbreak in the first round of the 2008 season - the first following the reunification of Champ Car and the IRL - at Homestead.
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Dixon inherited a fortunate fourth win of 2007 after Franchitti tangled with team-mate Marco Andretti while lapping him in the closing stages. It put him into the points lead, but he came off worse in penultimate round clash with Franchitti at Detroit and ran out of fuel on the last lap in Chicago to end the year runner-up.
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Dixon's first of six wins to date at Mid-Ohio came in 2007, once again ahead of Franchitti, closing the gap to 24 points in the standings.
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Dixon followed up his Watkins Glen victory by again beating Franchitti at Nashville, this time from pole position.
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Dixon made it a hat-trick of Watkins Glen victories in 2007, his first of three in a row in a late push for the title that just came up short against Andretti-Green's Dario Franchitti.
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Dixon beat Wheldon in a straight fight at Nashville in 2006 to score his seventh career win. Wheldon would go on to lose the title on countback to Sam Hornish Jr.
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Dixon was largely outshone by new Ganassi team-mate Dan Wheldon in 2006, the team's first with Honda power after ditching the uncompetitive Toyota units. But on a day when mechanical trouble forced Wheldon out, Dixon upheld Ganssi honour to win for a second year in a row at Watkins Glen.
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After a barren 2004, Dixon returned to winning ways in the penultimate round of 2005 at Watkins Glen - but it was only enough to boost him to 13th in the points.
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Dixon's third win of the 2003 season at Richmond came from pole position. Remarkably, he led every single one of the 206 laps and would go on to claim that year's title.
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After a run of poor results, Dixon got his 2003 title challenge back on track with victory at Pikes Peak, pipping future team-mate Tony Kanaan.
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After PacWest ran out of funds, Dixon joined Chip Ganassi Racing midway through 2002, and switched with the team to the IRL for 2003, winning first-time out at Homestead.
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Dixon's first win came at Nazareth in 2001. On only his third start, the reigning Indy Lights champion drove his PacWest Reynard to victory by less than a second from Kenny Brack.
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