DALLAS, May 19 (Ticker) -- The San Antonio Spurs were lucky to have Manu Ginobili and Tim Duncan. The Dallas Mavericks could have used Jason Terry.

Ginobili scored 30 points and Duncan had a big second half to lead the Spurs to a 91-86 victory over the Mavericks in Game 6 of their Western Conference Semifinal series.

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In winning three NBA titles over the last seven years, the Spurs have shown they can handle pressure. They have driven that point home by avoiding elimination for the second straight time.

On Monday, San Antonio will attempt to finish its comeback from a 3-1 deficit, something just eight teams have done in NBA history.

"The experience helps but honestly, it's one game," Duncan said. "It's going to be a basketball game and the emotions are going to be there. It's going to come down to who shows up, to who makes shots, to who makes plays down the stretch.

"Now it comes down to one game," said Dirk Nowitzki, who scored 26 points and had 21 rebounds. "Game 7. We've been in one before. We'll see how it goes. If we execute better offensively we should be OK. We should be confident, we did go into San Antonio and won Game 2.

San Antonio entered Friday just 1-4 on the road in the postseason but got huge games from Ginobili and Duncan, while Dallas struggled on offense down the stretch without Terry.

"This win was huge because if we hadn't won, we would be out of here," Ginobili said. "We haven't gotten too confident because we haven't accomplished anything yet. We've got to try to finish the job on Monday."

Terry was suspended for one game by the NBA on Thursday for throwing a punch at Michael Finley during a scrum in the waning seconds of Game 5. The Mavericks sorely missed him as Terry's quickness and outside shooting have given the slower Spurs fits throughout the series. He is averaging 17.5 points and sealed a Game 4 win with a rainbow jumper over the 7-foot Duncan in the final minute.

In Terry's absence, the Mavericks started Jerry Stackhouse alongside Devin Harris in the backcourt, and the duo struggled, shooting a combined 7-of-29 from the field and committing seven turnovers.

"We missed his shooting," Nowitzki said. "He's one of the special shooters in this league. He stretches the floor for us offensively. They clogged us up pretty good in there. They were playing Devin's drives all night and waiting for him at the rim. We just couldn't get anything to go but saying all that, we still battled and had our chances to win."

Ginobili scored 17 of his points in the first half, keeping the Spurs close as the Mavericks opened a 47-41 lead. The game was tied at 67-67 after three quarters and Ginobili scored with 6:25 to play in the fourth to give San Antonio its biggest lead, 78-73.

"Manu carried us the entire game," Duncan said. "In the first half, he's the one that kept us alive. He gave us the opportunity to go into half time down only six. He continues to make shots for us, he continues to make plays for us and on top of that he was great rebounding the ball."

Trying to reach the conference finals for just the second time since 1988, the fourth-seeded Mavericks tied the game at 82-82 when Harris split a pair of free throws with 2:59 remaining.

A former Maverick who was constantly booed by Dallas fans, Finley buried a 3-pointer on San Antonio's next possession and, after a basket by Harris, Duncan scored in the lane to make it 87-84 with 1:48 to go.

"The boos are unfortunate, especially in a place where I feel I gave my blood and guts on the court and tried to be a model citizen," Finley said. "For my family to not be able to come to the games and enjoy them because of the things the fans are saying is disheartening. Now that I know I'm the enemy, it makes me go out there and play harder."

"Finley was great tonight," Duncan said. "He was big for us, just being mentally tough, knowing that the type of situation he's in. He continues to play through all of it."

Nowitzki had a reverse layup with 17 seconds left to make it 87-86. Ginobili made two free throws and Finley thwarted Dallas again, forcing Nowitzki to shoot an airball from the corner on a 3-point attempt.

"I really had nothing," Nowitzki said. "Fin was all over me and I probably should have drove it, hit a quick two and get another foul."

"Dirk's First-Team NBA," Finley said. "Any time he has the ball, he's a shot waiting to happen. I just wanted to make his shots difficult. Even the one's I was contesting, he was making. Unfortunately for them, he missed the one at the end."

Tony Parker capped the scoring with a pair of free throws.

Ginobili added 10 rebounds and was 12-of-13 from the line. Duncan scored 16 of his 24 points in the second half and Finley added 16 for San Antonio.

"Once I saw Tim was in foul trouble and things were going pretty well for me," Ginobili said. "We realized that it was going to be a great opportunity for me to attack more or take more shots, It went very well."

"I got a chance to play (in the second half)," Duncan said. "I was in a foul situation in the first half. I spent a lot of time on the bench. I didn't shoot the ball very well today, but I just kind of stuck with it. I got some shots to fall down towards the end there. Pop keeps calling my number and giving me those opportunities."

Josh Howard scored 17 points for the Mavericks, who suffered their first home loss of the postseason (4-1).

"It was a tough game and obviously a tough loss for us," Nowitzki said. "We didn't play well now we've got to go to their place where it will be tough to win."