The Spurs’ latest victory may have been a costly one as Duncan sprained his ankle with three minutes remaining on Sunday’s 108-97 win over Chicago. The reigning MVP is listed as questionable for Tuesday’s game.
San Antonio is an NBA-best 28-5 since January 1 and is in the midst of its longest winning streak since a season-high nine-game run from January 29-February 18.
The Spurs have won the first two games of a three-game homestand, including the victory over the Bulls.
The Spurs played their fifth straight game without starting center David Robinson, who is sidelined with a lower back injury.
San Antonio has won eight of its last nine home games and is 26-5 at the SBC Center this season.
New York avoided a three-game losing streak with a 120-111 home victory over the Milwaukee Bucks on Sunday.
Allan Houston reached the 50-point plateau for the second time this season as the Knicks won for the third time in five games.
New York is three games behind Washington for the eighth and final playoff spot in the Eastern Conference.
The Knicks posted a 96-95 victory over the Spurs at Madison Square Garden in the first meeting between the team son December 30.