MIAMI (AP) -- The San Antonio Spurs have three more chances to grab the championship trophy that slipped away last year.
The way they're dominating the Miami Heat, they might need just one.
Kawhi Leonard had 20 points and 14 rebounds, and the Spurs routed the Heat again, winning 107-86 on Thursday night to open a commanding 3-1 lead in the NBA Finals.
The Spurs can win their fifth NBA championship with a victory at home in Game 5 on Sunday and avenge their seven-game loss to Miami last year. And if the Heat are going to deny them again, it will take the biggest comeback in NBA Finals history.
LeBron James tried to keep the Heat in it with 28 points and eight rebounds, but Dwyane Wade was just 1 of 10 through three quarters and finished with 10 points.
No team has overcome a 3-1 deficit in the finals, and the way they were outclassed twice on their home floor makes it hard to imagine the two-time champions being the first.
Tony Parker added 19 points, and Tim Duncan had 10 points and 11 rebounds for the Spurs, who shot 57 percent from the field.
The Spurs lost twice in Miami to end last year's finals, their only defeat in the championship round. They won their two games in South Florida this time by a combined 40 points.
If this was the last home game of the season in Miami, it looked and sounded nothing like the ones to end the last two years, which featured confetti falling and trophies raised.
If the Heat force a Game 6, it would be in Miami Tuesday.
The Heat had followed their last 13 postseason losses with a victory, but at the end of a fourth straight season that went the distance, they might be out of gas. Miami seemed to lack the energy -- or maybe effort -- to defend San Antonio's precision ball movement for the full 24 seconds, and time after time the Spurs ended up with a shot from somebody who didn't have a defender nearby.
Not quite as sharp as when they shot a finals-record 75.8 percent in the first half Tuesday night, the Spurs were still plenty good enough to open another huge lead by halftime, and they turned away every attempt Miami had to make a run.