Watford midfielder Stephen McGinn has been ruled out for at least four weeks after suffering a fractured cheekbone and eye socket.
McGinn was hurt during the second half of Watford's 3-1 win at Queens Park Rangers last Friday after a tangle with Rob Hulse.
Hornets boss Malky Mackay is disappointed to have lost the 22-year-old, who has featured in all but one of the club's Championship games this season.
"It's very disappointing for him - but we've already spoken about how I want him to step on again during these next four or five weeks," Mackay told the club's official website.
"It's done now, so we've got to make the best of this time for him. He can't train fully of course, but what he can do is kick on again from the enhancements he'd made in the summer."
Mackay has praised McGinn's progress at Vicarage Road since he joined Watford from St Mirren back in January.
He added: "He's really taken to Championship football - and he's shown that more than ever of late. It's not easy coming from another country, another style completely. My own experiences of coming down from Celtic to Norwich tell me that.
"Stephen came to us in January from St. Mirren. And that first six months was all about understanding the challenges he was likely to face when involved on a regular basis.
"And I think he did that. He's been a real plus point for us this season; thinking about his game and his career and how he could develop himself to maximise what he could offer to the group."