"That's something I guess we need to talk about when it gets to that point," Nowitzki said. Nowitzki had arthroscopic surgery on his ailing right knee Oct. 19. Nowitzki, 34, played in just one of Dallas’ preseason games and has been sidelined for all 25 of the team’s regular season games. After winning the 2011 title, Nowitzki and the Mavericks took a notable step back last season, getting swept by the Thunder in the first round of the Western Conference playoffs. Nowitzki said he felt "pretty good" after the relatively light practice, which he followed by playing two-on-two with some of the Mavs' low-minutes players. It was the first knee surgery for the 7-foot forward in his 15th NBA season. Point guard Derek Fisher, who is undergoing an MRI on Wednesday to determine the severity of a strained patellar tendon in his right knee, also is expected to miss the Miami game.