West Brom boss Tony Pulis must do without Callum McManaman for between four to six weeks after the winger sustained an ankle ligament injury.
The 24-year-old suffered the blow in training this week as the Baggies prepared for their FA Cup fourth-round clash at home to Peterborough on Saturday.
Pulis has been left short of options in midfield after losing James Morrison to a ruptured hamstring in the 2-2 draw against Chelsea just over a fortnight ago.
He also revealed in the pre-match press conference that Albion skipper Darren Fletcher (knee) and vice-captain Chris Brunt (calf) are both doubtful for the visit of Posh.
But the 58-year-old coach has no intention of fielding a weakened team against the League One outfit, despite having to face Swansea and Newcastle next week in the space of just a few days.
"It's a three-game week but I have made my feelings about this competition very clear – I will be fielding a strong team to win the game," Pulis declared.