World champion Valentino Rossi qualifies sixth for Sunday 's U.S. Grand Prix . Italian struggling with shoulder problem in second race back after breaking his leg . MotoGP leader Jorge Lorenzo claims fifth consecutive pole position this season . TL;DR The first practice session of the 2014 Formula One season was held at Silverstone on Friday, and it looked like a typical day out for the sport's top teams.
World champion Valentino Rossi qualifies sixth for Sunday 's U.S. Grand Prix . Italian struggling with shoulder problem in second race back after breaking his leg . MotoGP leader Jorge Lorenzo claims fifth consecutive pole position this season . Spaniard edges out 2007 world champion Casey Stoner with fast penultimate lap .