San Antonio Spurs forward Tim Duncan bruised his right knee and sprained his right ankle yesterday in the second quarter of a 100-79 victory over the visiting Portland Trail Blazers.

The team said all of Duncan's ligaments appeared stable but that he would have an MRI exam today. He did not return to the game and the team said he would miss some playing time.

Duncan got caught up with Portland's James Jones and fell to the floor near the Spurs' basket with 7:40 left in the half. He was clutching his knee and had to be helped off the floor by two of his teammates.

"We'll have to find out a little bit more about the knee and hope that it's more scary than anything else. That's what I'm hoping," Spurs coach Gregg Popovich said. "He'll probably miss a little bit of time."

That likely includes Wednesday's home game against the Dallas Mavericks.

Tony Parker's 27 points led the Spurs. Brent Barry added 17 points for the Spurs in their third straight victory.

In other games:

* At Boston, Ray Allen had 20 points to lead the Celtics to an 80-70 win over the Cleveland Cavaliers, who were without LeBron James for the second straight game due to a sprained finger.

Boston improved to an NBA best 14-2.

Cleveland was led by Zydrunas Ilgauskas, who had 12 points and 13 rebounds.

* At Los Angeles, Jamaal Tinsley scored 10 of his 29 points in the final 4 minutes, and Jermaine O'Neal added 20 points and 15 rebounds, leading the Indiana Pacers to a 101-95 win over the Clippers.

* At Auburn Hills, Mich., Jason Maxiell had 18 points and 11 rebounds, and Richard Hamilton added 19 points as the Detroit Pistons defeated the New Jersey Nets, 118-95.

* At New York, Grant Hill scored a season-high 28 points, nine during a fourth-quarter flurry that broke open a close game, and the Phoenix Suns pulled away to beat the Knicks, 115-104.

Eddy Curry and Stephon Marbury scored 21 points apiece for the Knicks.

Marbury's father, Don, died while the game was being played, but was not in attendance. Marbury was escorted out of the arena by security shortly after the game. Team spokesman Jonathan Supranowitz said no other information was immediately available.

* At Los Angeles, Hedo Turkoglu sparked a pivotal 8-0 run with a three-pointer that put Orlando ahead to stay and added a layup with 55 seconds left to lead the Magic to a 104-97 victory over the Lakers. Orlando is off to a 15-4 start in its first season under coach Stan Van Gundy, matching the best start in the franchise's 19-year history.

* At Denver, Carmelo Anthony scored 30 points, and Kenyon Martin added a season-high 20 to help the Nuggets rout the Miami Heat, 115-89.

* At Seattle, Al Harrington and Stephen Jackson had 20 points each to lead the Golden State Warriors over the SuperSonics, 109-96. *