The Miami Heat and the Phoenix Suns both completed 4-0 victories in their NBA Conference first-round play-offs.
In the East, the Heat overcame the New Jersey Nets 110-97 with Dwyane Wade hitting 34 points.
The Suns advanced in the Western Conference after beating the Memphis Grizzlies 123-115.
The Detroit Pistons beat the Philadelphia 76ers 97-92 to go 3-1 up, while Seattle lead Sacramento by the same score after a 115-102 win.
Wade's post-season career-high total helped the Heat's cause with Shaquille O'Neal failing to score in the first half.
Eddie Jones added 21 points and O'Neal managed to make seven of his nine second-half shots.
Phoenix had six players in double figures with Joe Johnson leading the way on 25 points while Steve Nash had 24 and Shawn Marion hit 23.
The Suns led 39-20 after the first quarter and they went on to complete the first four-game sweep in franchise history.