Red Bull Racing's Mark Webber reckons Sebastian Vettel will have 'no problem' matching Michael Schumacher's record of seven F1 drivers' titles.

Vettel has dominated again this season and recently secured his fourth crown, something Webber has no doubt he will manage again.

Speaking ahead of the United States Grand Prix this weekend at Austin in Texas, Mark's last-but-one race in F1, the Aussie added that the German's success isn't just down to the car.

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"Seb's phenomenal, a very tough act," Webber told British newspaper, The Mail on Sunday. "I think he will reach Michael Schumacher's total of seven championships, no problem.

"Seb has won a lot of races when the car has been good, but he has also won a lot when the car hasn't been good. Seb is like Alain Prost, but with a qualifying lap at his fingertips. Impressive. Also, he hardly ever makes a mistake. It's not all the car.

"It's been fascinating for me to be in the boxing ring with him. I will look back at that and, realise you have understood a lot about yourself from what went on. It was a big juicy part of F1. Of course I would have loved to have had a seven-year offset in age with Seb, instead of the 11-year difference between us. It would probably have exploded properly, then," Webber added.

Webber and Vettel fell out badly in Malaysia earlier this season, when the German ignored team orders and 'stole' the victory. His actions there and his comments subsequently are partly to blame for the booing he has got on the podium, Webber reckons.

"You have to be able look at yourself in the mirror, mate. Obviously, you need to be ruthless at times. I know you can't be a little Teddy bear and roll over, but I am happy about the way I have gone about my career. That two or three weeks after Malaysia was tense for us both," continued the Red Bull Racing man.

"I think after the race his initial reaction was correct, I think he was shattered at what he had done as he said in Malaysia.

"But his reaction two weeks later in China - when he said that he was not sorry at all - was probably not the best way to encourage people what to think of him."