Liverpool's Kevin Stewart has had surgery on a hernia, a source has told ESPN FC.
The midfielder could well miss the Reds' remaining four matches of the season while he recovers.
Stewart, 23, has not featured for the Liverpool first team since January and had been appearing for the club's under-23s side to maintain fitness.
His future at Anfield is uncertain ahead of the summer, having failed to force his way into Jurgen Klopp's plans recently.
Sources said in January that Liverpool had rejected interest from several clubs during the transfer window, with Stewart valued at around £10 million.