Ducati insist they have not yet decided who will be Jorge Lorenzo's MotoGP team-mate next season.
However Sporting Director Paolo Ciabatti did rule out another new signing by confirming that either Andrea Dovizioso or Andrea Iannone will be retained.
Speaking to Sky Italia
, Ciabatti declared: "We have not decided yet. First we wanted to ensure the signing of Lorenzo. Now we will wait to decide whether Iannone or Dovizioso stays.
“The two are exceptional and it will not be an easy choice. We have spoken to both of them and I don't think the uncertainty over their future will affect them. We spoke with Jorge and [he] does not care which one is his team-mate.”
Reigning triple champion Lorenzo will move from Yamaha to Ducati on a two-year deal, officially announced on Monday.
The Spaniard is the most high profile rider to change teams since Valentino Rossi moved from Yamaha to Ducati and Casey Stoner from Ducati to Honda, in 2011.
“We knew we wanted to sign one of the best riders to allow us to win back a title," Ciabatti explained. “I think the bike we have this year and the fact we have demonstrated its competitiveness has been key to reaching this agreement.
“I would say it was not difficult to convince Jorge.”
Dovizioso and Iannone have each claimed one podium in the three events so far this season, having fallen in the other two races - most notably when Iannone collided with runner-up Dovizioso at the penultimate turn in Argentina.