4) Adam Bogdan (Bolton Wanderers)
Impressed against Liverpool in the FA Cup earlier this season but has struggled to hold down a first-team place with Bolton, where Andy Lonergan is regarded by most as the first-choice. Available on a free transfer.
3) Esteban Alvarado (AZ Alkmaar)
The 25-year-old won’t be widely known among Premier League fans but has a more than decent CV. Over 100 league games for his club side, who he joined in 2010, as well as international caps for Costa Rica, for whom he backs up Keylor Navas from the bench. Again, his contract is up in the summer.