MEMPHIS, Tenn. - Go ahead and call the San Antonio Spurs old. They're also experienced enough to know what to do only a win away from their first NBA Finals berth since 2007: Finish off the Memphis Grizzlies.

"Absolutely, absolutely," Spurs center Tim Duncan said Sunday before a short practice. "We know they're not going to lay down. We're going to have to beat them. We understand what we have going here, and we understand that we want to finish is as quickly as we can."

The Spurs wasted a 2-0 lead in the Western Conference final a year ago when Oklahoma City won four straight games.

They know time is running out for their current Big Three, featuring the 37-year-old Duncan, Tony Parker, and Manu Ginobili along with coach Gregg Popovich.

San Antonio is up 3-0 after rallying from an 18-point deficit in the first quarter Saturday night and winning 104-93 in overtime.

"We want to finish as soon as we can for a lot of different reasons," Parker said. "I think that we should give them no hope, and it's always sweet to win on the road."

The Grizzlies find themselves in the exact same position as this franchise's first postseason in 2004 - trying to avoid being swept by the Spurs. San Antonio finished off that sweep, and history shows all 107 teams leading 3-0 in a best-of-seven series have never lost.