Celtic manager Brendan Rodgers says he was "happy" for defender Gustaf Lagerbielke to leave the club in January, only for Cameron Carter-Vickers' injury to scupper any potential move.
The Swedish defender was reportedly signed for £3m in the summer, but has made just six league appearances, and has only featured once in the league since September.
"We had interest on Gustaf for a few weeks and I was happy for him to go, but only when everything in house was taken care of," Rodgers said.
"Purely because of the history of our centre-halves in the first half of the season. Cam, Maik [Nawrocki], and Stephen Welsh have been injured for significant periods.
"The last thing I wanted to do is send a guy out until I was sure those guys could be fit. Cam picks up his injury and at that point I can’t let him go out. I have to look after the squad for the second part of the season.
"It’s tough on Gustaf because he wants to play but I have to look after the squad."