The Phoenix Suns have claimed a hard-fought road win to go 3-1 up in the Western Conference finals with an 84-80 victory against the Los Angeles Clippers on Saturday.

DeAndre Ayton was dominant in the paint with 19 points, 22 rebounds and four blocks as the Suns triumphed, leading the whole way but having to withstand a late Clippers challenge.

Devin Booker, who took his protective face mask off in the second half, led all scorers for Phoenix with 25 points but fouled out with 1:05 to go, leaving veteran guard Chris Paul (18 points and seven assists) to finish the job with a series of late free throws.

The Clippers, once again without the injured Kawhi Leonard, got within one point in the final quarter, including with 13.2 seconds to go, but never took the lead.

The result means Phoenix are one win away from qualifying for their first NBA Finals appearance since 1993. It would also be the first Finals appearance for 11-time All-Star Paul.

Phoenix had led by 14 points at half-time, but the Clippers stormed back into the game with a 30-19 third quarter.

Paul George fought hard for the Clippers with 23 points, 16 rebounds and six assists, while Reggie Jackson scored 20 points. Ivica Zubac was admirable with 13 points and 14 rebounds.

But the Clippers struggled from beyond the arc, shooting five from 31 (16.1 per cent), with Jackson hitting two-of-nine from three-point range, while George made one-from-nine.

The Suns did not fare much better from range, with Booker missing all five three-point attempts and Paul all three.

Phoenix's 84 points was the fewest in a win this season, regular or postseason.

The series returns to Phoenix on Monday, with the Suns chasing a close-out win.