Hamilton: Your worst enemy can be yourself

Lewis Hamilton's greatest enemy is not Mercedes teammate Nico Rosberg or Ferrari's Sebastian Vettel, but it is, he believes, himself.

As he seeks to improve on the supreme form that has lifted him 27 points clear in this year’s drivers’ title contest after four races, the two-time world champion has admitted he fears nobody.

But he does worry about his own failings. “I know everyone is talking about the psychological stuff, but the only psychological warfare there is, is within myself. Your worst enemy can be yourself, so you're fighting against that invisible worst enemy."

“I want to be the best I can be. I know I can do this, and I know I can do that, and if I don't that really bothers me. Otherwise, I'm not fazed. Generally, I don't get fazed by any of that stuff.

“If somebody goes quicker, I figure out how I can be better. I'm not one to think: I've got the upper hand, so keep going, keep doing what you're doing."

Meanwhile Hamilton told media he can see something of himself in Manny Pacquiao, even if the Filipino lost the 'Fight of the Century' last weekend.

The Mercedes driver had a ringside seat at the welterweight's title fight in Las Vegas with Floyd Mayweather Jr. and surprisingly identified more with the beaten boxer than the winner.

"When I was watching the fight, I felt Pacquaio won. He was the attacking one," Hamilton told reporters at the Spanish Grand Prix on Thursday.

"I felt I had more similarities with him, watching his style, I was thinking he's the attacking guy, he's out there, he's hungry. He wants it more than anything.

"But otherwise I've not really learnt anything from those guys, apart from they wear much bigger shorts than me," he grinned.

Hamilton, winner of three of four races so far this season, faces his own fight at the Circuit de Catalunya this weekend and can deliver another big blow to team mate and title rival Nico Rosberg.

The Briton has started every race in pole position this season and won in Barcelona from pole last year.

While every team is hoping to make a step up in the first round of the season in Europe, now that they have had time back at their factories after the long-haul openers, Hamilton was confident Mercedes could stay ahead.