Dirk Nowitzki has bumped up his workout regimen as he continues to recover from his right knee arthroscopic surgery. "I haven't seen him on the court, but I've seen him working harder and harder on all the machinery, so that's a good sign," owner Mark Cuban said. The Mavericks intend to make Nowitzki available sometime this week. Today is the one-month anniversary of his surgery. The original timetable was three-to-six weeks. So as of Tuesday, it will be officially closer to six weeks than three. "I'm not going to talk about that because it's not my department," coach Rick Carlisle said. "He's picked up his activity, but it's not my place. Again, I would expect he'd probably talk to you guys sometime soon. In the meantime, we got to soldier on without him." Nowitzki's return date remains a mystery.