Spanish World Cup legend Iker Casillas has been linked to Liverpool and Newcastle.
Casillas, 36, is currently unable to get a game for FC Porto.
He has been on the bench while Jose Sa, 24, has been picked instead of the Real Madrid icon.
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Casillas took to Instagram to register his obvious disappointment after being dropped for last week’s Champions League game against RB Leipzig.
There was talk that Casillas is being punished for using his mobile phone during training.
But Porto manager Sergio Conceicao insists the veteran keeper is out of favour for tactical reasons.
Liverpool boss Jurgen Klopp has been criticised for refusing to replace Simon Mignolet and Loris Karius.
Both keepers have failed to inspire confidence in a defence that has leaked goals ever since the German left Borussia Dortmund for Anfield.
But the link with Newcastle is slightly surprising given that Rob Elliot has turned in some strong performances this season.
Casillas is under contract to Porto until next summer.
He is the highest earner at the club on around £450,000 a year.