Celtic are understood to be close to signing Belgium goalkeeper Logan Bailly from Oud-Heverlee Leuven.
Doncaster have signed midfielder Richard Chaplow on a two-year contract.
Aberdeen manager Derek McInnes has handed the Dons a pre-cup final boost by signing an extended contract.
McInnes and assistant Tony Docherty both took time out of preparing for Sunday's League Cup final against Inverness to sign two-year extensions.
The pair started at Pittodrie in April last year and their new contracts tie them to the club until the summer of 2017.
McInnes is on the brink of glory in his first full season as Aberdeen bid to secure their first silverware since the 1995-96 season. The Dons also sit second in the Scottish Premiership, following four consecutive bottom-six finishes, and have a William Scottish Cup semi-final against St Johnstone to look forward to.
McInnes told the club's official website: "When Tony and I arrived at Pittodrie we knew we would need time to transform it into our squad. We have demonstrated this season that we are definitely heading in the right direction but we're far from the finished article.
"We both really enjoy working at the club but we are only some way towards what we would like to achieve here. It's great that the board also believes we are doing a decent job and the additional contract allows us time to really plan for the future in terms of developing the squad."