The Houston Rockets levelled their NBA playoff series against the San Antonio Spurs, while the Cleveland Cavaliers swept the Toronto Raptors.

James Harden had a double-double of 28 points and 12 assists in the Rockets' 125-104 game four win on Sunday.

It saw Houston tie the Western Conference semi-final series at 2-2 ahead of Tuesday's game five in San Antonio.

Eric Gordon had 22 points off the bench for the Rockets, who outscored the Spurs 68-51 in the second half.

Spurs star Kawhi Leonard finished with 16 points after going seven-of-14 from the field.

The Cavs waltzed into the Eastern Conference Finals, completing a sweep of the Raptors with a 109-102 win in Toronto.

Cleveland have not lost a game in the first two rounds of the two most recent postseasons, becoming the first team in NBA history to start 8-0 in back-to-back playoffs.

LeBron James continued his fine form with 35 points, nine rebounds and six assists, while Kyrie Irving had 27 points.

The Cavs' next opponents will be either the Boston Celtics or Washington Wizards, with their series level at 2-2.

The Wizards went on a 26-0 run on their way to a 121-102 win in game four.

Bradley Beal (29 points) and John Wall (27 points and 12 assists) saw the Wizards to their win.