Both MotoGP and World Superbikes are in action this weekend, and a grand total of four titles could be wrapped up on Sunday. At Sepang, Valentino Rossi could secure his 7th MotoGP title on Sunday, while Hiroshi Aoyama could clinch the last ever 250cc world title. Several hours later, at the last WSBK round at Portimao in Portugal, the World Superbike title is likely to go down to the wire, with little to choose between Noriyuki Haga and Ben Spies. Between the two World Superbike races, Cal Crutchlow looks likely to secure the World Supersport championship.
Of course, it's not quite as simple as all that, and so below is a guide to who needs to finish where in which races to wrap up the championship. The 125cc class already has a champion, with Julian Simon clinching the title after beating Aspar team mate Bradley Smith at Phillip Island last weekend.