With Craig Gordon now aged 35, here are three potential replacements for the Scottish veteran at Celtic Park.
Celtic qualified for the Europa League's knockout stages after Christmas.
Ibrox club Glasgow Rangers youngster Declan John played with former Celtic and current Hull City goalkeeper David Marshall at Cardiff City.
Leeds United should line up a move for Hull City goalkeeper David Marshall if Rob Green departs for Arsenal.
A new keeper is expected to be an early priority for Garry Monk at Middlesbrough, following the departure of Victor Valdes, so what are his options?
Hull City need to finish the season strongly if they hope to avoid relegation from the Premier League.
Hull fans have been voting for the player that they would not mind seeing the back of this month.
Which Hull City player would fans not mind seeing leave this month?
The Tigers are yet to earn their stripes back in the top flight, with their goalkeeping problems just the tip of the iceberg.
Hull City fans have not hidden their feelings after their side's 2-0 home defeat against Stoke City.