Dirk Nowitzki is sticking with the Dallas Mavericks at least through the 2010-11 season.

A week before opening training camp, the Mavs made sure their superstar forward remains under contract for the next five seasons with a lucrative extension Tuesday.

Nowitzki, 28, already was signed for the upcoming season and had a $16 million-plus option for 2007-08 under the maximum contract he signed in 2001. The new deal guarantees that season, plus tacks on three more. He'll turn 33 the summer his new contract expires.

Terms of the deal were not released, but with basic raises the extension is likely worth around $60 million.