Fabio Cardoso joined Glasgow Rangers in the summer of 2017, but has failed to make an impact at Ibrox.
Ibrox side Glasgow Rangers are attempting to bring in Russell Martin.
Glasgow Rangers' January signings both took to Twitter after their mid-season tour away from Ibrox came to an end.
Glasgow Rangers defender Fabio Cardoso has been linked with a move away from Ibrox.
Bruno Alves, Fabio Cardoso, Eduardo Herrera, Lee Hodson and Dalcio will reportedly leave Ibrox club Glasgow Rangers along with Carlos Pena in the January transfer window.
Rangers have appointed Graeme Murty as the club's full-time manager until the end of the season - which probably isn't good news for Fabio Cardoso.
Out-of-favour Rangers defender Fabio Cardoso is said to be interesting Liga Nos side Estoril.
Rangers flop Fabio Cardoso has been linked with a return to Portugal with Estoril.
Scottish Premiership giants Rangers paid £1.3m to sign Fabio Cardoso in the summer but the Portuguese centre-back may be about to leave Ibrox already.
Ibrox defender Fabio Cardoso is yet to impress in a Rangers shirt as of yet.