Formula One returns this weekend after a break of nearly a month, with three former champions trying to stop Red Bull's Sebastian Vettel from capturing a fourth consecutive world title.
Vettel holds a 38-point lead over second-place Kimi Raikkonen of the Lotus team in the championship standings heading into Sunday's Belgian Grand Prix at the Spa-Francorchamps circuit in eastern Belgium.
Two-time champion Fernando Alonso of Ferrari is right behind in third, 39 points behind Vettel. And 2008 champion Lewis Hamilton of the Mercedes team -- who won the most recent race, the Hungarian Grand Prix, on July 28 -- is fourth, 48 points back of Vettel.
"We have to stop Sebastian winning over the next few races," Hamilton told Formula One's website. "He's quite far ahead so we constantly need to be gaining."
