Bayern Munich chief executive officer Karl-Heinz Rummenigge is adamant Arjen Robben will extend his contract with the club.
The Holland winger reportedly cast doubt over his new deal following an alleged dressing-room bust-up with team-mate Franck Ribery during the Champions League semi-final against Real Madrid.
But Rummenigge told Bild: "I guarantee that no stars will leave. The agreement [with Robben] is as good as signed. Arjen will stay at Bayern in the long-term."
Meanwhile, Bayern defender Jerome Boateng insists ahead of the Champions League final against Chelsea that the Bundesliga is as strong as the Premier League.
Boateng has played in both leagues, having spent last season with Manchester City before returning home to Germany with Bayern at the start of this campaign.
He has previously claimed that England has the stronger league but told Bild: "That's not true anymore. That statement was some time ago.
"The Premier League still has more money but both sports leagues are on a par."
During his time with Roberto Mancini's men, Boateng tasted victory over Chelsea but he does not feel that result will help Bayern on May 19, nor that they can learn much from the Blues' semi-final win over Barcelona.
"There is no magic bullet," he said.
"Also, I do not think Chelsea will play in the final as in the semi-final against Barcelona. They will not set up the barricade of 11 men in front of their own penalty area.
"I will leave it to our scouts to concoct a plan."
Both teams will be without several key players through suspension for the final, with John Terry, Ramires, Raul Meireles and Branislav Ivanovic missing for Chelsea and Holger Badstuber, David Alaba and Luiz Gustavo for the German side.
Boateng blamed harsh refereeing in their second leg against Real for the absence of his fellow defenders Alaba and Badstuber.
"I feel the referee lacked sensitivity," he said. "Both yellow cards were too harsh.
"I am so very sorry for the two of them, I've told Holger and David that I feel for them."