Nottingham Forest midfielder Ryan Yates faces three weeks out with a calf injury.
The box-to-box midfielder opened his account last weekend in the win at Millwall.
But he came off in the closing stages of Wednesday's home defeat to Middlesbrough.
Both clubs have been interested in signing the promising midfielder,23, who is under contract until 2023.
But Forest boss Chris Hughton is a huge admirer after making him a regular.
Now though Forest, who are 20 th in the Championship and battling the drop, are set to be without Yates for three weeks.
He will miss Saturday's FA Cup tie at Swansea and could be out for up to four games.
Hughton said: “Ryan felt his calf during the game and at one stage he looked like he could continue but that proved not to be the case.
“It's a little bit sore and he'll certainly miss Saturday's game.
“That's a big blow for us considering how consistent Ryan's performances have been.”
Homegrown Forest academy graduate Yates spoke this week about how Hughton's trust is helping him develop.
The 6ft 3in midfielder reflected: “I look at the midfielders who play for the top teams - the likes of Jordan Henderson at Liverpool and Scott McTominay at Manchester United.
“Being a midfielder, you need to get on the ball and get us moving.
“I just have a feeling of responsibility, more than I have with other managers.
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“I feel like he really trusts me.
“There’s been moments in games where I’ve given the ball away a few times, but I don’t get that feeling of anxiousness that I used to get thinking about if I get the ball again and lose it.
“I just think: 'just give me the ball again; I don’t care, just give me it'.
“I feel he trusts me to do the right thing, even if it hasn’t worked.
“As a player, I don’t think you can ask for more than that - just having that full trust in you, believing that you can do it. That’s something I haven’t had.”
Former Forest assistant and Manchester United midfield legend Roy Keane previously took Yates under his wing and rated him highly.
Yates added: “If I want to be a top central midfielder in the Championship, your ball retention has to be better.
“You basically have to be the best at everything, especially if you’re going to be that box-to-box type.”