SAN ANTONIO (Ticker) -- The San Antonio Spurs are proving in the Western Conference finals that a good defense usually handles a solid offense.

The second-seeded Spurs will attempt to finish a four-game sweep of the top-seeded Phoenix Suns on Monday and earn plenty of rest before facing either the defending champion Detroit Pistons or the Miami Heat in the NBA Finals.

San Antonio, which yielded the fewest points during the regular season (88.4), has smothered Phoenix by jumping to double-digit leads in the first quarter on its way to victories in the first games.

Tim Duncan made all 15 free throws, scored 33 points and grabbed 15 rebounds to lead the Spurs to a 102-92 triumph over the Suns on Saturday.

Tony Parker and Manu Ginobili scored 18 points apiece for San Antonio, which had a 49-35 rebounding edge to win for the 44th time in 48 home games this season.

After scoring at least 100 points in 12 straight postseason contests, the Suns were held to a playoff-low in points in Game Three, scoring just 10 in the second quarter.

Amare Stoudemire, who is averaging 37.3 points in the series, scored 34 and had 11 rebounds for Phoenix.

NBA Most Valuable Player Steve Nash scored 20 points but managed just three assists. Joe Johnson played his first game in 17 days after breaking a bone near his left eye and added 15.

No NBA team ever has captured a series after losing the first three contests. Should the Suns win, the teams head back to Phoenix for Game Five on Wednesday.