Parker scores 20 points, Ginobili adds 19 as Spurs hand Mavericks 6th straight loss, 111-86

Dallas Mavericks guard Darren Collison (4) drives against San Antonio Spurs guard Tony Parker (9), of France, during the first half of an NBA basketball game in Dallas on Sunday, Dec. 30, 2012. (AP Photo/Mike Fuentes) (The Associated Press)

Dallas Mavericks guard Darren Collison, left, goes for a shot against pressure from San Antonio Spurs forward Tim Duncan during the first half of an NBA basketball game in Dallas on Sunday, Dec. 30, 2012. (AP Photo/Mike Fuentes) (The Associated Press)

DALLAS – Tony Parker had 21 points and nine assists, Manu Ginobili had several key baskets among his 20 points and the San Antonio Spurs handed the Dallas Mavericks their sixth straight loss, 111-86 on Sunday night.

Dirk Nowitzki had eight points on 3-of-9 shooting a week after making a surprise return in a 38-point loss to the Spurs in San Antonio.

The Spurs led all the way, with Tim Duncan helping a 20-6 start by hitting several jump shots. He finished with 18 points, 10 rebounds and three blocks.

Darren Collison scored 18 points to lead the Mavericks, whose losing streak is their longest since January of their championship season in 2010-11.