Toby Collyer is set for another lengthy spell on the sidelines, according to West Bromwich Albion boss Ryan Mason.
The 21-year-old midfielder, who is on a season-long loan with Albion from Manchester United, was forced off with a calf injury 10 minutes into last week's draw with Birmingham in the Championship.
"It's quite a big injury. He's at United at the minute where they're assessing him and then in the coming weeks we'll decide his plan regarding his rehab," Mason told BBC Radio WM.
"We've got him on loan for the season and normally any loan player that gets an injury that's a bit more than a small one, more a significant one, it's only right for the parent club to look at them, check them over, and we're in dialogue and hopefully he can do his rehab and come back better.