West Brom are close to sealing the loan signing of Sandro from QPR but have been dealt a blow with the news that Callum McManaman has been ruled out for six weeks.
Midfielder Sandro is having a medical with the Baggies ahead of a move until the end of the season, with a view to a permanent transfer.
The switch will bolster the Baggies' midfield after McManaman was sidelined with an ankle injury which is likely to keep him out until March.
James Morrison (hamstring) is out for two months and Darren Fletcher (knee) remains a doubt for Saturday's FA Cup game with Peterborough.
The club are trying to push the Sandro deal through so the Brazil international can play against Posh at The Hawthorns.
Boss Tony Pulis told a press conference: "We're interested in Sandro but nothing's been done yet so that's ongoing.
"Whether we can do a deal or not we'll have to wait and see. We're working on it if we can get a deal done we'll get a deal done."
Sandro has made 11 appearances for Rangers this season but has not played for Jimmy Floyd Hasselbaink's Sky Bet Championship side in 2016.
He has played 28 times for the club, scoring once, since a 2014 switch from Tottenham.
The deal would give the Baggies a boost with winger McManaman likely to miss at least six games as they aim to stay clear of the Barclays Premier League bottom three.
The 24-year-old has made 14 appearances for the Baggies - but just two starts - this season and 24 in total after joining from Wigan last January.
Chris Brunt is also a doubt to face Posh with a calf injury and Pulis insisted he will not rest players.
"I'll pick a strong team again," he said. "I know it's a three-game week, I think if they're well managed and well prepared then they should be able to cope with three games a week."