Phillips was sent off for handball during Friday night’s defeat at Brighton and serves a one-game ban, leaving head coach Garry Monk to ponder on who to start in central midfield.
Eunan O’Kane is struggling with the groin injury that has forced him to miss the last two matches and although Liam Bridcutt is back in training, the skipper has yet to feature since breaking a bone in his foot in September.
Pablo Hernandez is still out with a hamstring strain, so fellow midfielders Stuart Dallas and Alex Mowatt will be in contention for a return to the starting line-up.
Reading are still without Danny Williams who serves the second of his three-match suspension following his red card in the 5-0 defeat at Fulham.
Liam Moore is set to keep his place after making a timely return to the line-up to inspire his side’s 2-1 win over Sheffield Wednesday which cemented third place in the table.
Yann Kermorgant, a second-half replacement against Wednesday, is pushing for a start after earning the praise of Royals boss Jaap Stam for recent performances.
Otherwise Stam will be tempted to name an unchanged side as he looks to maintain the pressure on the automatic-promotion spots.