Last weekend provided a return to international motor racing for two of Northern Ireland's top racing drivers.

Dario Franchitti climbed back ahead of Jenson Button in the Castrol Rankings thanks to his IndyCar podium at Watkins Glen.

The combination of the Norisring and a previous-generation Audi could be the one to beat at the Norisring DTM round this weekend.

Lewis Hamilton's recent hot streak has brought Britain back to the top of the Castrol Nations Rankings

The big movers and shakers in the Castrol Rankings this week

Jimmie Johnson is in the form of his life at the moment, as his fourth place in the Castrol Rankings proves

Mark Webber's spectacular exit from the European Grand Prix left Sebastian Vettel still ahead in the Castrol Rankings

Sebastian Vettel's top spot in the Castrol Rankings is under serious threat at this weekend's European Grand Prix

Former World Champion Jacques Villeneuve made a cracking return to racing in the NASCAR Nationwide Series last weekend

NASCAR Sprint Cup Champion Jimmie Johnson moved up to fourth place in the Castrol Rankings by taking his first road course win at Sears Point