SAN ANTONIO, April 11 (Ticker) -- Tony Parker was not about to let the Seattle SuperSonics play the role of spoiler.

Parker had 27 points and nine assists as the San Antonio Spurs stayed atop the Western Conference with a 104-95 victory over the SuperSonics.

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With the win, the Spurs opened a one-game lead over Dallas in both the Southwest Division and in the West, giving them the inside track for the No. 1 seed in the upcoming playoffs.

In doing so, San Antonio (60-18) reached 60 wins for the third time in franchise history. The last time it did so in 2002-03 came en route to the club's second NBA championship.

The Spurs never trailed after Michael Finley's 3-pointer to end the first quarter made it 25-22. Parker had back-to-back layups in a 6-0 burst to start the second and finished the first half with 16 points and seven assists as San Antonio led, 55-48.

The closest Seattle got after halftime was 59-54, but Parker had a 3-pointer to begin a 14-0 burst that broke it open. Brent Barry, who scored 16 points, finished the run with two straight 3-pointers to make it 73-54 midway through the third quarter.

The Sonics never got closer than 11 points thereafter as they had their longest winning streak this season snapped at four.

Tim Duncan had 18 points and 14 rebounds for the Spurs, who were playing the first of five straight games to end the season against teams with losing records.

Rashard Lewis and Luke Ridnour led Seattle with 15 points apiece. Leading scorer Ray Allen was held to 14 on 5-of-13 shooting.