Miami Heat coach Erik Spoelstra has revealed that the San Antonio Spurs put in a "great" performance to overcome his side 107-86 in game four of the NBA Finals.

The Spurs moved into a 3-1 lead over the Heat on Thursday night, as Spurs point guard Tony Parker stood out with 19 points for his side.

"They played great and I can honestly say I don't think any of us were expecting this type of performance," Spoelstra told reporters after the game.

"They [the Spurs] were great. You have to give them credit for that."

San Antonio will claim this season's NBA championship if they are able to beat the Heat in game five on Sunday.