Former F1 star Sir Jackie Stewart has warned Lewis Hamilton that his 'playboy lifestyle' is affecting his form on the track.
The 2015 F1 champion has suffered a dip in form recently, and because of that, it has seen him slip behind Mercedes teammate Nico Rosberg in the Driver's Championship.
Following another poor showing by Hamilton's high standards on Sunday, when he came third in the Singapore Grand Prix, an inquest into the Brit's recent form has begun.
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Stewart, who is Britain's only other triple world champion, has pointed to Hamilton's lifestyle, as well as overconfidence, which could be some of the factors contributing to his current failure.
The Daily Mail has reported Stewart's comments following Sunday's race, with the former driver saying: "Maybe you can bottom out. That can happen through consistent success because when you have consistent success everything can seem so easy.
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"Suddenly things can go less well — you overdrive, you are not on the ball, or you live a life that distracts you.
"If you are at the top in any line of work, you can get carried away with success. You think you can get away with things. Then someone else comes along and drives better or more consistently.
"I was always frightened of being beaten. I always thought there could be someone out there better than me or who might have a better car. So I always worked on that basis. I could never sit back and relax."
Since rising to fame through Formula One, Hamilton has hit the headlines for his antics off the track, and has gained a reputation for partying.
His high-profile split from singer Nicole Scherzinger made news last year and could only have been a distraction to his driving.
After securing the Driver's Championship in 2015, Hamilton was expected to defend his title this year, but it seems that his chances are slipping away with just six races left.
He is currently second in the standings and eight points behind teammate Rosberg. The two are in a straight shootout for first place as they are too far ahead of all the other drivers, so Hamilton will need to rediscover his form if he's going to defend his title for two years in a row.
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