SAN ANTONIO (Ticker) -- Facing what amounts to a must-win situation, the Phoenix Suns will be happy to get back Joe Johnson when they visit the San Antonio Spurs on Saturday in Game Three of the Western Conference Finals.

Johnson, who has been out since Game Two of the conference semifinals as he recovers from a fractured orbital bone, has declared himself ready to go Saturday when the Suns try to chip away at a 2-0 deficit.

Perhaps still fatigued from a wild win over the Dallas Mavericks in the semifinals and with Johnson unable to go, Phoenix ran out of steam late in losing the first two games at home.

The Suns got their usual efforts from MVP Steve Nash and Amare Stoudemire, but had no answer for Spurs forward Tim Duncan down the stretch in both losses. Duncan scored 11 of his 28 points in the fourth quarter of Game One and 25 of his 30 after halftime in Game Two on Tuesday.

Behind Duncan's strong play, San Antonio claimed a 111-108 victory Tuesday, erasing a fourth-quarter deficit for the second straight time to win its fourth consecutive playoff game.

The Spurs' dynamic backcourt of Tony Parker and Manu Ginobili combined for 50 points and Nazr Mohammed added 11 points, eight rebounds, three steals and two blocks. San Antonio became just the 16th team in conference finals history to sweep the first two games on the road.

Since Duncan joined San Antonio, the club is 7-1 in playoff series in which it won the first two games, sweeping three of those sets.

Nash continued a wonderful postseason Tuesday with 29 points and 15 assists and Stoudemire added 37 points, but Phoenix lost for the third time in its last four home games.

Johnson will be fitted with a protective mask but still should see plenty of minutes for a Suns squad that had just six players see more than two minutes Tuesday.

Game Four will be played Monday at San Antonio.