Weekend review and results round-up

It's the time of year when championships are clinched and deciders are set up - and there was plenty of both taking place this weekend

Dean Stoneman and Edoardo Mortara can now start celebrating their championship victories.

Mortara had a pretty abysmal weekend of race results in the Formula 3 Euro Series at Oschersleben, but with rival and Signature team-mate Marco Wittmann faring little better, the Italian could add the F3 Euro crown to his 2009 Macau victory. Stoneman can now look forward to a Williams Formula 1 test after clinching the F2 title in race one at Valencia.

The IndyCar Series title race will go to the wire. While Helio Castroneves won at Motegi, Dario Franchitti chipped away at Will Power's championship lead once again, leaving them 12 points apart with just Homestead remaining.

Formula Renault 3.5 has a three-way fight in prospect at Catalunya after a crazy Silverstone weekend. Esteban Guerrieri won twice on the road but lost one win on a technicality, while Daniel Ricciardo had a violent aerial crash, a pole and a second place to show for his weekend. Both will try and overhaul leader Mikhail Aleshin in the finale. Guerreri's race one disqualification meant British F3 champion Jean-Eric Vergne became an FR3.5 winner in only his second appearance.

The British Touring Car Championship managed to be more eventful still. Despite being in the thick of a wild multi-car crash in race one at Donington Park, Jason Plato still leads the standings heading for the Brands Hatch finale, but Donington winners Gordon Shedden, Matt Neal and Tom Onslow-Cole will make it a four-way decider.

In MotoGP, the first ever Aragon Grand Prix saw Casey Stoner win for the first time in nearly a year, while Jorge Lorenzo had his worst finish of 2010 - a fourth place. He still holds a comfortable championship lead though, whereas things have closed right up in 125cc, which saw Marc Marquez wiped out at the first corner and his title rivals Pol Espargaro and Nico Terol dice their way to first and second.

Elsewhere, SEAT took two home wins in the World Touring Car Championship at Valencia with its title contender Gabriele Tarquini and Tiago Monteiro, and Paul di Resta charged to a second straight DTM victory at Oschersleben.

Debutant Neel Jani was among the winners in a typically spectacular Superleague weekend at Portimao, where Vitaphone Maserati duo Andrea Bertolini and Michael Bartels moved closer to the title in the bill-sharing World GT1 race, and NASCAR's chase for the title kicked off with a win for Clint Bowyer at Loudon.

The motorsport action

NASCAR: Bowyer wins as Stewart runs dry

125cc: Espargaro wins, Marquez taken out

Moto2: Iannone dominates Aragon Moto2

MotoGP: Stoner takes first win of 2010

BTCC: Shedden victorious amid carnage

BTCC: Onslow-Cole earns Donington victory

BTCC: Neal win sets up four-way decider

DTM: Di Resta wins again at Oschersleben

Formula 2: De Marco wins, Stoneman seals title

Formula 2: Vasiliauskas wins Valencia finale

F3 Euro Series: Bottas wins, Mortara clinches title