PHOENIX, May 24 (Ticker) -- Tim Duncan, Manu Ginobili and the San Antonio Spurs are putting on an offensive clinic against the defenseless Phoenix Suns.

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Duncan and Ginobili sparked another outstanding fourth quarter as the Spurs seized control of the Western Conference finals with a demoralizing 111-108 victory over the Suns.

Duncan overcame foul trouble to score 30 points and Ginobili added a reckless 26 for the second-seeded Spurs, who have won the first two games here with uncharacteristic precision on offense, which has been the calling card of the top-seeded Suns.

For the second straight game, San Antonio erased a fourth-quarter deficit with great shooting. In Game One, the Spurs scored 43 points on 16-of-22 shooting in the final period. In Game Two, they scored 31 on 12-of-17.

"(We) did have good poise and pretty good execution down the stretch," Spurs coach Gregg Popovich said.

"The last two games, they have been phenomenal at making big shots in the fourth quarter," Suns star Steve Nash said. "At some point, you've just got to congratulate them and say they are better than us."

Despite their sharp execution, the Spurs still trailed, 102-100, with just under three minutes to go after a 3-pointer by Nash, the NBA MVP who had 29 points and 15 assists.

With 2:33 left, San Antonio took the lead for good on a 3-pointer by Robert Horry, who has made a career of sinking clutch shots.

Ginobili followed with a driving layup where he put the ball behind his back and in with reverse spin for a 105-102 lead with 1:51 remaining. After Amare Stoudemire missed a layup, Ginobili sank a 20-footer with 1:19 to play.

"I just saw or thought that was the best opportunity for me," Ginobili said of his drive. "There were very concerned with not giving me the left hand, so I just tried to go back to my right."

"He has been great for us, especially against these guys (with) his ability to start finding people and making plays," Duncan said.

As in Game One, the Suns kept coming but could not stop the Spurs. Stoudemire had a layup, but so did Duncan off a feed from Ginobili, making it 109-104 with 44 seconds left.

"We did not make a stop when we had to," Suns coach Mike D'Antoni said. "That's to their credit. ... Ginobili and Duncan always making the right play and decision."

A layup by Quentin Richardson made it a one-possession game, but the Suns - the league's most porous defensive team - were forced to foul.

Split free throws by Horry and Ginobili around a dunk by Stoudemire gave the Suns a last gasp, but Nash's 3-pointer off a court-length dribble hit the front rim as time expired.

Tony Parker scored 24 points for the Spurs, who may be the NBA's most versatile team. Having led the league in defense, San Antonio is dominating this series with its highly underrated offense.

"I think moving the ball, playing pick-and-rolls and making them adjust or chase us is the key," Ginobili said.

"When it comes down to it, they treat every possession like it's extremely important, and they go to their big fella, Tim Duncan, and try to get something good," Stoudemire conceded.

Stoudemire scored 37 points and Richardson added 18 for the Suns, who now are battling history as well as the Spurs. Just three teams have won a best-of-seven series after losing the first two games at home, and although it happened earlier in this playoffs, you get the sense that San Antonio is too composed to let it happen again.

Games Three and Four are Saturday and Monday in San Antonio, where the Spurs are 43-4 this season.

"It's never easy playing the Spurs, but now that we're down we have to go back to the drawing board and figure something out," Stoudemire said.

Down by 13 points in the first quarter, the Suns took a 54-53 halftime edge as Duncan committed his third foul just before the buzzer. He sat down with his fourth foul at the 8:14 mark of the third quarter, fueling an 11-0 run that gave Phoenix a 75-66 lead - and prompted his return.

"We stuck him in there earlier in the third quarter than we normally would have," Popovich said. "He was smart enough to hang in there foul-wise."

"I was anxious to get back on the floor," Duncan said. "When I got back out, I tried to be a little more assertive."

The Suns held an 85-80 lead entering the final period, when Duncan scored 14 points. The Spurs finally regained the lead at 98-97 with 4:33 remaining on a jumper by Game One hero Brent Barry.

Nazr Mohammed had 11 points, eight rebounds, three steals and two blocks and Horry scored 10 points for San Antonio, which shot 51 percent (44-of-86) from the field and committed just 12 turnovers - one in the fourth quarter.

Shawn Marion had a quiet 11 points and 12 boards for Phoenix, which shot 56 percent (44-of-79).