IndyCar series champion Ryan Hunter-Reay passed Takuma Sato for the lead with 53 laps remaining and roared to victory at the Milwaukee Mile on Saturday.

Reigning world champion Jorge Lorenzo cut compatriot Dani Pedrosa's lead in the championship standings to just seven points with his third career win at the Catalunya MotoGP on Sunday.

Carl Edwards topped qualifying Friday for the NASCAR Sprint Cup race at Michigan International Speedway, with drivers enthusing about the speed of the track.

Bad news for Sebastian Vettel's rivals — not only has he extended his contract but Red Bull are confident they have fine-tuned their car for Europe's high speed circuits.

Sebastian Vettel said he is not worried about the conditions or the weather forecasts for Sunday's Canadian Grand Prix after claiming his third consecutive pole position for the race at the Circuit Gilles Villeneuve.

Sebastian Vettel said he is not worried about the conditions or the weather forecasts for Sunday's Canadian Grand Prix after claiming his third consecutive pole position for the race at the Circuit Gilles Villeneuve.

A tire testing session involving Mercedes and Pirelli that was criticized by rival Formula One teams will be referred to the FIA's international tribunal as a possible breach of the sport's rules.

Mike Conway won the first of two races at the Detroit Grand Prix, showing he's well suited for IndyCar Series road racing after deciding he's uncomfortable on ovals.

Pirelli dismissed allegations that it breached Formula One rules by conducting in-season tire testing with Mercedes, saying Friday it acted fairly and professionally over the test which it believes offered no benefit to the German team.

Former champions Williams will switch from Renault to Mercedes engines from 2014 when a new V6 unit is introduced, the Formula One team said on Thursday.