Formula 1 veteran Michael Schumacher thinks it's possible his record haul of seven world titles could be beaten by Red Bull's Sebastian Vettel.Spanish sports daily Marca quoted Vettel as saying comparisons between himself and his former mentor Schumacher were "ridiculous".TAKING ON SCHUMIVettel said: "I have three titles, which is nothing compared to seven. Beating his record is not something that can happen in the next couple of years, so I don't even think about it. I have had some very good years but it could change suddenly."Schumacher has a slightly different view. He believes Vettel (26) is already on course for his fourth title, a feat not achieved by Schumacher until 2001, when he was 32.Schumacher said: "He has the best package and championships are usually won by the best. Records are there to be beaten. They motivated me when I was racing and in the end I achieved it."Believe me, if Sebastian could surpass what I did, I would be happy for him. In a short time he has won three titles, why can't he win seven?"German racing legend Hans-Joachim Stuck doubts Vettel will overtake Schumacher as the most successful driver yet. "The times and the circumstances are too different," he said. "If one night Schumacher dreamed of having a new front wing, he could have it the next day and test it as well. That is not possible under the current regulations."Stuck said Vettel's success was very dependent on the skills Adrian Newey: "If, for whatever reason, Newey were not there any more, I think the team could be in a very different situation."