Swansea City boss Brendan Rodgers has failed with his bid to extend Marvin Emnes' loan spell at the club.
The Dutch Under-21 international has impressed in a month-long stay in South Wales, scoring twice including the winner over local rivals Cardiff City at the weekend.
However, Emnes was initially loaned out by Gordon Strachan, and he has since left Middlesbrough, with Tony Mowbray now in charge.
Mowrbay is now keen to work with Emnes and has rejected Swansea's offer to keep the 22-year-old.
"I was looking to keep Marv here but I totally understand that Tony wants to take him back," Rodgers said.
"There may not be a big possibility of doing anything with him until January now, because the (emergency loan) window closes on November 24 and Middlesbrough are probably going to want a few weeks to look at him.
"He has been terrific here and is a good marker for the sort of player I want in the team. I've said from day one at Hull that I wanted a striker and nothing has changed.
"We need a striker who is mobile, who plays with intensity and has quality.
"Marvin has all that, as he showed with a terrific goal on Sunday.
"We have Stephen Dobbie and Craig Beattie who will be keen to make a mark, along with Gorka Pintado.
"But we have a lot of games to play and a tough schedule over Christmas and I want to get someone in."
Emnes himself added: "I've settled into the team and got my goals, but my contract is with Middlesbrough so I have to go back to the Riverside.
"It's a bit sad that I have to go back because of that, but the situation is different at Boro, so we will see what happens and whether I get a chance.
"If not, perhaps I can go on loan again.
"It would be nice to come back to Swansea if that's the case."
Emnes will return to Boro after their match with Bristol City on Wednesday, but he will not play this weekend as Swansea host Middlesbrough and his loan technically runs until Sunday.