The Utah Jazz beat the Phoenix Suns 100-88 on Tuesday night to clinch at least the No. 8 playoff spot in the Western Conference and set up a possible first-round matchup with the top-seeded Spurs.
Utah (35-30) still can secure the No. 7 seed if it defeats Portland on Thursday and Denver (36-28) loses its last two games.
The NBA will announce its playoff schedule Thursday.
San Antonio (48-16) begins the postseason either Saturday or Sunday at the AT&T Center. The Spurs end the regular season with back-to-back road games against Phoenix and Golden State on Wednesday and Thursday, respectively.
The Silver & Black clinched the top seed in the West with a 124-89 rout of Portland on Monday night. The victory was the eighth in a row for the Spurs, who have won 22 of their last 25 games.
Before Monday night's game, Spurs coach Gregg Popovich was asked whether teams should have the option of petitioning the league about when they prefer to start the playoffs.
"That's impossible," Popovich said. "The league decides who plays when and that's that. You can't politic for that sort of thing. You're no better than anybody else. You shouldn't have any special privileges.
"Whenever they tell you to go play, you go play. You may like it or not like it, but that's what you do. You don't call ahead and nag or moan, or set your case or anything like that."
Paul Millsap finished with 26 points and 18 rebounds to help the Jazz snap a seven-game losing streak against the Phoenix, which was eliminated from the playoff race. Al Jefferson also had an outstanding game for Utah, scoring 18 points and grabbing 16 rebounds.
Utah holds a 3-1 edge against San Antonio in the playoffs, but the Spurs beat the Jazz in five games in the 2007 Western Conference finals. The Spurs also eliminated Denver in the first round that season and went on to win their fourth NBA crown.
Denver plays at No. 2 seed Oklahoma City on Wednesday and at Minnesota on Thursday. The Spurs are 5-1 against the Nuggets in the postseason.