Cardiff City goalkeeper David Marshall has the subject of a £5m approach from Premier League side Hull City, BBC Wales Sport has learned.
Saturday's Championship encounter with Reading could be the Scottish international's farewell ahead of a potential move.
Marshall, 31, has made more than 280 appearances for Cardiff since arriving from Norwich City for free in 2009.
Cardiff have signed Bolton goalkeeper Ben Amos on a season-long loan.
However, they have also sold back-up keeper Simon Moore to Sheffield United.
Marshall, considered one of the best goalkeepers outside the Premier League, was the subject of interest from West Bromwich Albion last summer and has also been with Everton.
Before the Hull's interest emerged, head coach Paul Trollope admitted Cardiff had players who would interest other clubs.
He said: ''I think any manager or any coach wants to keep their best players. But also I think any coach will tell you all players have their value whether they are top of the league or in League Two.
''Players do have their value. Of course you want to keep your best players, but we are also aware of their value.''
The signing of Amos and defender Joe Bennett, who has joined from Aston Villa, means Cardiff have made seven signings this summer.
Lex Immers, Kenneth Zohore, Emyr Huws, Jazz Richards and Frederic Gounongbe have also moved to the Welsh capital.
Meanwhile, midfielder Kagisho Dikgacoi's contract with the club has been terminated by mutual agreement.
Words from BBC Sport