Preston on-loan striker Danny Welbeck could return to parent club Manchester United after breaking down in training on Wednesday.

The 19-year-old, who missed North End's last three matches, suffered a reaction to a knee injury during a session at United's training ground.

"His knee swelled up after training," Ferguson told BBC Radio Lancashire.

"He'll have another scan on Monday but it's not looking good. It's a blow but we'll have to get on with it."