Tim Duncan speaks out about tough conditions in game one of NBA Finals

San Antonio Spurs power forward Tim Duncan has spoken out about the tough conditions in game one of the NBA Finals.

The Spurs faced the Miami Heat and took a 1-0 lead as the air conditioning at the AT&T Center broke down, leaving Heat star LeBron James to suffer from cramp with just under four minutes remaining.

"I think [LeBron] asked out of the game once or twice before that, so we knew he was getting tired but we were all getting tired out there," Virgin Islands-born Duncan told reporters after the encounter.

"I don't think I've played in anything like this since I left the islands."

Game two gets underway on Sunday, with officials confirming that the air conditioning issue has now been resolved.