Max Biaggi has fuelled the war of words with Italian arch-rival Valentino Rossi in the build-up to Sunday's 500cc motorcycling grand prix by accusing his compatriot of undermining his character.

Biaggi and Rossi have had two clashes already this season, most recently in Barcelona when they were involved in a post-race scuffle.

The pair, who have made no secret of the fact that they can't stand each other, were recently given a final warning by the International Motorcycling Federation.

"Rivalry in any sport is healthy but what has gone on in recent weeks is not good for the situation," Biaggi told BBC Sport Online in an exclusive interview.

"We both know we have to be careful on Sunday but I'll just go my way. I've been doing what I do for many years and never had a problem with anyone, only with him."

"Even in the past, when he was racing in a different category, he used to say bad things about me in the press even though he was not even my rival at the time."

Biaggi said there was no point in trying to make up with Rossi. "We don't speak a lot because there is not much to say. But everyone knows what has been going on."

Biaggi's comments can serve only to heighten anticipation ahead of Sunday's sell-out Donington showdown.

"I haven't done well at Donington at 500 in the past and nor has Yamaha and this is the big chance to put that right," said Biaggi.

"I obviously want to be somewhere on the podium but probably I have to win the race to win the championship."

The 30-year-old Roman may be looking for some divine intervention to collect all 25 points.

A few days before winning in Assen, Biaggi met the Pope who, it is said, blessed his riding gloves.

"I was in Rome for a charity occasion and we managed to have a few words. Who knows, perhaps it brought me luck."