 Vettel's running was limited by a water leak that forced him to spend half the session in the pits, while Caterham's Heikki Kovalainen suffered a puncture when he made contact with Scuderia Toro Rosso driver Jean-Éric Vergne, and Pastor Maldonado suffered an engine failure in his Williams late in the session.Vettel completed the trifecta of fastest lap times when he topped the final session on Saturday morning, finishing two and a half tenths of a second faster than Hamilton.The hour-long session was marked by a collision between Sauber's Sergio Pérez and the Marussia of Charles Pic that damaged the floor of Pic's car.