The winners and losers of MotoGP's reshuffle More than half of the MotoGP grid is a new face in a new place this season. Some have starred, but others need to knuckle down and do better 1496275200 MotoGP

Has Rossi's replacement already stepped forward? Sooner or later, Valentino Rossi will retire. But even if the MotoGP legend doesn't hang up his helmet until the end of 2018, one rider on the grid might already have one arm on the '19 Yamaha's handlebars 1494374400 MotoGP

Was Lorenzo's Ducati debut as bad as it looked? As far as first races go, Jorge Lorenzo's debut with Ducati was underwhelming at best. But was that down to teething problems, or does Sunday's race in Qatar point to further problems to come throughout the year? 1490745600 MotoGP

Can Yamaha's new star topple Marquez? Marc Marquez probably shouldn't have won the 2016 MotoGP title, but he did. His reward is facing competition that looks even stronger this season - and is coming from more areas 1490227200 MotoGP

Can Norris avoid McLaren's young driver scrapheap? Formula 2 hotshot Lando Norris gets his Formula 1 debut next year with McLaren. But the troubled team has mangled the career paths of recent recruits including Sergio Perez, Kevin Magnussen and Stoffel Vandoorne. So how will Lando fare? Asks JAMES ROBERTS 1542326400 F1

How an F1 team can go off the rails Williams's plunge to the back of the Formula 1 field in 2018 has been dramatic. PAT SYMONDS explains how things can go so badly awry with an F1 design, and why finding the way again mid-season is so difficult 1542326400 F1

F1 must not clip Verstappen's wings Max Verstappen copped some flak for his post-race antics in Brazil, but Formula 1 must realise that it should not try to change a driver who has become one of its box office stars 1542240000 F1

The 37-year-old rookie starting Mercedes' next big project Gary Paffett was once caught out by inexperience, when he thought the DTM was "too easy" after a first title. After a 13-year wait for his second championship, it's a lesson he will have to remember as a Formula E rookie 1542240000 FE