Marquez ends Friday on top in Spain

Marquez was the first man to dominate the times in the 45-minute session but only after the 21-year-old had repeated his error from first practice, running very wide in the blustery conditions at Turn 1.

The world champion ended the session with a 1m31.454s.

Jorge Lorenzo temporarily put his Yamaha 0.053 seconds quicker than Marquez shortly after the halfway point.

The two-time MotoGP champion would end the session in fourth place, only 0.114s seconds behind Marquez, but separated from him by Dovizioso and Espargaro.

Cal Crutchlow, who had briefly topped the session early on, ended up fifth fastest as the Briton improved by almost a whole second from his morning time.

Dani Pedrosa and Stefan Bradl ended the session in sixth and seventh, with Pedrosa 0.441s slower than Honda team-mate Marquez.

Pol Espargaro finished ahead of Bradley Smith and Valentino Rossi as they rounded out the top 10.

Suzuki's return to grand prix racing suffered a setback when Randy de Puniet, who ended second practice 18th, was forced to climb off his bike with plumes of smoke emitting from the engine with just five minutes of the session remaining.