Sebastian Vettel laughs off allegations that Red Bull is breaching Formula 1 rules

Formula One's runaway championship leader is laughing off allegations that the team is illegally using traction control to gain a big advantage on its rivals.

Sebastian Vettel has a 60-point lead heading into this weekend's Korean Grand Prix and appears certain to win a fourth-straight title.

The German's huge speed advantage in the previous F1 race in Singapore prompted former Minardi team boss Giancarlo Minardi to allege Red Bull is using banned traction control to gain a cornering-speed advantage.

Asked about the allegation on Thursday, Vettel said "we are pretty proud of the system and others have to figure out how we have done it."