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The Ducati MotoGP team is facing an investigation following its Qatar Grand Prix victory with Andrea Dovizioso, regarding a rear tyre winglet it used during the race.

Ducati introduced a new winglet positioned right in front of the rear tyre for the season opener at Losail.

Four of Ducati's five rival manufacturers - Honda, Suzuki, Aprilia and KTM - filed a complaint to race direction over the legality of the winglet after the race.

The device is thought to be used for cooling the rear tyre.

It was initially trialled by Danilo Petrucci, and both he and team-mate Dovizioso then used the winglet during the race.

Dovizioso went on to win by just 0.023 seconds over Marc Marquez, while Petrucci was sixth.

Ducati has now been requested by MotoGP's technical directors to hand over the parts for inspection to determine whether they comply with the current regulations.

Both Dovizioso and Petrucci's results are provisional pending the outcome of the investigation.

Autosport understands the technical delegates were already aware of the device, but could not launch an investigation until a formal complaint had been submitted