Monza, Italy - Force India's Sergio Perez led the way in a wet first practice for the Italian Grand Prix on Friday with Formula One title contenders Lewis Hamilton and Sebastian Vettel giving the fans only glimpses of their cars.
It was the first time this season that a Mercedes, Ferrari or Red Bull driver had not led the practice timesheets but the conditions explained everything and the top teams will not be remotely concerned.
Mercedes' championship leader Hamilton, 17 points clear of Vettel ahead of Ferrari's home race, completed six laps in the 90-minute session and was only 11th while his German rival did four and was 17th.
Vettel was also slowed by a gearbox problem, but was using a spare with no concern for the weekend.
Mexican Perez, whose team were rescued from administration this month and given a new lease of life as a new mid-season entry owned by Canadian billionaire Lawrence Stroll, put in a one minute 34.000 seconds lap right at the end of a session with plenty of spray.