Mark Webber believes Lewis Hamilton needs to re-find the 'consistent hunger' he had when he started in the sport, if he is to emulate his F1 title success from 2008.

Hamilton has been a bit off form of late and in the last two races has been outshone by team-mate, Nico Rosberg. Webber, however, remains convinced that the Englishman does have what it takes and is confident he is 'capable' of doing the business in 2014.

"I do think Lewis needs to find that consistent hunger he had back in the day. Lewis wanted to prove himself back then [when he made his debut]; and he did," Webber said in an interview with British newspaper, The Mail on Sunday prior to this coming weekend's United States Grand Prix at Austin in Texas, the penultimate round in the 2013 F1 World Championship and Mark's last-but-one F1 outing.

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"Someone once said they take [Sebastian] Vettel out of a cupboard on a Thursday night and put him back on Sunday night. Lewis is different, yeah [and his private life is often in the 'papers]. It's all about getting the right balance.

"There's every chance Lewis could fight for the title next year, he's the right age, he has the right environment at Mercedes.

"The thing is he started so early. He now has how own private jet... but, basically, this all comes down to working hard with the guys in the team, understanding what each track needs, and understanding what the car needs. Then he can just get on with it. I want him to do well; and he's certainly capable of it."

As for why Hamilton has struggled to match his early potential, Webber believes it is in part down to the Pirelli tyres, something the Aussie says has hurt him too.

"With Lewis going into 2014 having just one championship, I don't think many of us would have signed up for that after those first two years in F1. He is having trouble expressing himself on the Pirelli tyres, like me," Webber confirmed. "It's not meant to be an excuse - even if it probably sounds like one - but it's obvious I had less success on the Pirellis. One of my biggest strengths is fast corners.

"For me, I have had to lift through the fast corners [now], it's a big string from your bow gone. Seb is very good in low speed corners, and he's probably the master on the Pirelli tyres. It's bad news for the others that Pirelli are staying [in 2014]."