Jun.3 (GMM) Formula one drivers Nelson Piquet Jr, David Coulthard and Sebastian Vettel could be at the centre of an elaborate and imminent musical-chairs scenario.

The Swiss publication Motorsport Aktuell on Monday published speculation that the duo might be subject to the reshuffle following Sunday's Canadian grand prix.

Stage one of the rearrangement, according to the rumour, would be the replacement of rookie Piquet - who has struggled in the high profile Renault seat so far this season - by F1 veteran Coulthard, who currently drives for Renault-powered Red Bull.

22-year-old Piquet, meanwhile, would be slotted into Vettel's Toro Rosso seat, with the burgeoning German to fill Coulthard's vacant spot at parent outfit RBR.

Motorsport Aktuell explained that Piquet's move to Toro Rosso would enable the Brazilian to develop as a grand prix driver in a lower-pressure environment.

The rumour assumes that Vettel and Piquet will then stay in their respective new seats in 2009, while Coulthard steps into retirement.

"Nothing is impossible," the report at motorsport-aktuell.com pointed out.