David Alaba's father has accused Uli Hoeness of "spreading dirty lies" about the defender's ongoing contract negotiations with Bayern Munich.

Former Bayern president Hoeness said this weekend that the 28-year-old must not let money rule his head during talks over a new deal, with his present contract due to expire at the end of the 2020-21 season. 

Austrian Alaba joined Bayern's academy in 2008 and has since gone on to win nine Bundesliga titles. He is reportedly admired by the likes of Manchester City and Barcelona.

His father, George, has reacted furiously to Hoeness' insinuation his son is only interested in financial rewards, revealing he has turned down opportunities to leave the club before. 

"I brought David Alaba to Bayern as a teenager," he told Sky Sport. "Over the years, I've had several opportunities to transfer David to another club, but we were loyal and always chose to stay. I didn't expect Bayern to be spreading dirty lies in public about salary and commission claims.

"Claiming that we can't come to an agreement over a new contract due to such payments is one of those filthy allegations. All because we didn't accept the figures they have presented to us. We have our own ideas."

Hoeness also said Alaba's agent, Pini Zahavi is seeking a substantial fee for negotiating a deal, claiming he wanted something "in the double-digit million range" to secure Alaba's signature; something Zhavi denies. 

"At no point did I talk in detail about a possible commission payment with the people in charge at Bayern," Zhavi said.

"The only time this topic came up was when we met in Lisbon. Hasan Salihamidzic asked me how I would imagine that. I told him we should work on an agreement with the player first, but I wouldn't ask for more than usual. I don't want to get more than other agents who have received commission payments from Bayern.

"Again, we've not talked numbers yet."