Mercedes driver Lewis Hamilton set the fastest time of the week on the final day of the opening test in Barcelona on Thursday. Pic/AFP

Lewis Hamilton likened himself to Roger Federer as he declared he should have no problems in beating Sebastian Vettel to this year's F1 world championship. Hamilton ominously ended the opening test in Barcelona on top of the time sheets with the fastest lap of the week. The British driver, 33, is gearing up for his assault on a fifth championship to join only Juan Manuel Fangio and Michael Schumacher as drivers who have won the F1 title on more than four occasions.