With Craig Gordon now aged 35, here are three potential replacements for the Scottish veteran at Celtic Park.
Paul McGrath was impressed with Aston Villa duo John Terry and Sam Johnstone’s performances at the City Ground.
Aston Villa loanee Sam Johnstone has been linked with a January exit.
The Aston Villa stopper has been in fine form this season.
West Bromwich Albion are interested in Sam Johnstone, who is currently on loan with Championship side Aston Villa.
Aston Villa goalkeeper Sam Johnstone could be recalled by Manchester United in January.
Aston Villa are keen on Karl Darlow if Sam Johnstone is recalled from his loan, but perhaps Darlow's Newcastle United teammate would be a better option.
Aston Villa signed Robert Snodgrass, Sam Johnstone and Josh Onomah on loan from West Ham United, Manchester United and Tottenham Hotspur respectively in the summer transfer window.
Three Premier League sides are said to be chasing the Aston Villa stopper on loan from Manchester United, but surely Celtic should join chase?
West Ham United goalkeeper Joe Hart is currently due to spend the season on loan at Manchester City.