Formula 1 world champion Sebastian Vettel has identified Fernando Alonso and Lewis Hamilton as his biggest challengers ahead of the British Grand Prix.

Vettel picked his two main adversaries out amongst the leading drivers of the modern generation.

Vettel said: "The ones that stand out are probably Fernando, he's one of the most complete drivers. Lewis is very, very quick."

The German currently stands fourth in the drivers' championship, trailing Alonso by 26 points.

Vettel is confident that Red Bull will be back on the attack as this tightly-contested season heads to Silverstone this weekend.

He said: "Weather-wise it is going to be different. I'd be surprised if we had 30C sunshine in Silverstone, but maybe the English summer will treat us differently this year.

"It will be interesting, and it is important for us to confirm the feeling we had in Valencia. Not the result."

Vettel will be hoping for a return to the podium after being forced to retire last time out in Valencia with a failed alternator.