Webber under fire before home GP.

David Coulthard has spoken out ahead of this weekend's Australian Grand Prix, picking home favourite Mark Webber as his target.

The Scot has questioned Australian hero Webber's tactics, claiming that he was prone to banging into other cars when collisions could be avoided. For good measure, DC added that Webber was now under pressure at Williams after the good results shown by new team-mate Nico Rosberg.

"Sometimes at the Grand Prix Drivers' Association, we discussed certain actions carried out by Mark that people though were wrong," Coulthard said, "Last year, he came together with Fisichella in Malaysia and with Michael [Schumacher] in Turkey. For sure, I'm not saying that's entirely his fault - it takes two to crash into each other - but this is a non-contact sport."

The expectation that surrounds Webber is naturally heightened when he competes in his home grand prix, but his results don't yet reflect the hype that he receives in Melbourne each year, with his four years in F1 registering only one top three finish, his third place at the Monaco GP in 2005. Despite that, and his other reservations, Coulthard believes that his rival has the ability to succeed.

"I think he's doing an able job down at Williams and, given the right package, he can win grands prix," the Red Bull driver remarked.

That's not the same view held by former Williams driver Jacques Villeneuve, however, who warned that Webber also risked losing sight of victory if he stays too long in a car which cannot win.

"Mark's an amazing qualifier, and also a strong racer, but his qualifying is so good that it makes his racing look not so good when it actually is," the Canadian driver, "The problem is that, if you spend too many years in a car that can't win, the day you're not used to it will have an effect."