Mike Miller has surgery on thumb

TAMPA -- Heat forward Mike Miller underwent surgery Friday to repair a torn ligament and fracture on his right thumb and is expected to be sidelined until January.

Miller, who suffered the injury during Wednesday's practice when his hand got caught in a teammate's jersey during drills, had the 45-minute procedure in Miami as his teammates prepared to play the Orlando Magic in the final exhibition game. The game was later canceled because of wet court conditions.

The team had suspected Miller would be lost for an extended period, but details of his recovery time frame emerged Friday. He will be in a cast for four weeks and will then begin the rehabilitation process.

"It's good to finally have a resolution about his injury, and now a course of action to make it better," Heat coach Erik Spoelstra said. "I feel bad for Mike. I know how badly he wanted to get this season started in the right way. He's down right now, but it's the unfortunate reality of our profession. I knew this season wasn't going to be easy."

The Heat did receive a morale boost Friday when guard Dwyane Wade returned to the team after missing the past week to attend court hearings in pursuit of custody of his two sons.

Wade flew to Tampa to rejoin the team Friday morning and was on the court working out with teammates two hours before the canceled game. Spoelstra said Wade, who strained his right hamstring three minutes into the Oct. 5 preseason opener, passed a series of conditioning tests and has been cleared to resume full practice drills on Sunday.

"It felt all right," Wade said. "I've been working out and I've been in the gym, so today was no different, just another day to test my hamstring out even more. I'm feeling good. Ready to move on to the next day and get some practice under my belt so I can be ready for the opener."

The Heat open the season Tuesday at Boston. Wade expects to play.

"No setbacks, I'm there," Wade said.

Michael Wallace is an NBA writer for ESPN.com. The Associated Press contributed to this report.