The extra final practice session scheduled ahead of the Argentinian MotoGP race has been cancelled due to bad weather.
The session was added after Michelin decided to withdraw the rear tyres that had been in use during the weekend due to safety issues, following Scott Redding's rear delamination during FP4 on Saturday.
The 30-minute practice was aimed at helping riders acclimatise to the new rubber that Michelin will give the teams for the race.
However, poor weather conditions have led to race direction cancelling the session, as the track was very wet.
The regular warm-up is still scheduled for 10.40am local time (1540 GMT), but if the track is still wet, there is a chance teams will face the prospect of starting the race with an untested tyre.