Here’s the Fort Worth Star-Telegram reporting on the 41-27 Dallas Mavericks, Mark Cuban and Dirk Nowitzki:

It’s not often that Dallas Mavericks owner Mark Cuban publicly criticizes his superstar forward, Dirk Nowitzki.

Monday, though, was one of those rare occasions.

Cuban took time before Monday’s game against the Boston Celtics to tell the media of a conversation he had with Nowitzki earlier in the day. It’s about as critical as Cuban as ever publicly been about Nowitzki.

“I think sometimes he loses concentration, and I think we’ve got to get past that,” Cuban said. “I mentioned it to him today. I asked him how his nap was during the game [Sunday at Oklahoma City]. He laughed. At least that’s while I was facing him. When I turned my back and walked away, I don’t know.”

Nowitzki had two first-quarter rebounds against the Thunder and finished the game with just four boards and 17 points on 6-of-12 shooting. Cuban also was none too pleased that Nowitzki had just 12 points and six rebounds during last Tuesday’s 108-85 loss on the road to the Golden State Warriors.