ESPN Exclusive Interviews: Lewis Hamilton after his Canadian GP victory

Lewis Hamilton believes Sebastian Vettel and Fernando Alonso will be his biggest rivals as he mounts a title challenge.

Having won the Canadian Grand Prix, Hamilton moved to the top of the drivers' championship, two points ahead of Alonso and three clear of Vettel. While seven different drivers have won races this season, Hamilton told ESPNF1.com in an exclusive interview that he thought the current top three would be the main challengers for the title this season.

"I think Fernando and Sebastian," Hamilton said. "Sebastian being the current world champion and Red Bull are the current constructors' champions. They've got an incredible car again this year and so they will be very tough to beat throughout the year.

"Fernando and Ferrari have picked up their pace massively. You can see through the last three races they've brought new upgrades to Barcelona, to Monaco and then a big upgrade package copying our exhaust system in Montreal, so they are pushing incredibly hard. The whole battle of the year is understanding the tyres and the development of the cars from the teams, and also the drivers staying on form."