Philippines will be without the services of first-choice goalkeeper Neil Etheridge for Thursday's must-win World Cup qualifying fixture against Yemen.
Etheridge suffered a hamstring injury in the build-up to the clash, and won't be risked by coach Thomas Dooley.
"He's not 100 percent and it's still unknown if it holds for the game or not. So for me, it's a reason that he's not going to play," said Dooley.
Roland Muller will fill the void left by the Walsall keeper, and Dooley is confident that he will rise to the challenge.
"Roland had an excellent training session yesterday. He did an excellent job. He looked sharp, quick. The that I saw him in the Challenge Cup, he was outstanding over there," said Dooley.
The Azkals are already missing captain Phil Younghusband who is suspended due to an accumulation of yellow cards.
Dooley's men currently sit in third spot in Group H, with five points from their opening two matches.