Fisher has made 64 Dons appearances since joining the League One club from Blackburn Rovers in October 2020.

Dons boss Liam Manning said on Monday they had accepted a bid from Swansea for their number one.

"It's disappointing, timing-wise, and with how it's played out with the noise and disruption," Manning said. "He won't be involved tomorrow [against AFC Wimbledon]."

Martin believes Fisher's qualities make him an ideal fit for his possession-based style.

The Blackburn academy product had previously spent time on loan with the Dons, as well as Northampton Town.

Wigan-born Fisher made four cup appearances for Blackburn.

Known for his distribution, Fisher joined Martin's Dons on loan in January 2020 and, though he was a back-up option at that stage, returned on a permanent deal 10 months later.

After Swansea lost Newcastle United loanee Freddie Woodman - their first choice in goal for two seasons under Steve Cooper - Martin initially handed Steven Benda the keeper's shirt this season.

He was replaced in September by Ben Hamer, but the 34-year-old is now likely to make way for Fisher.

Benda, 23, could move on this month should Swansea complete a deal for Fisher.