Middlesbrough captain Emanuel Pogatetz insists the club need to keep the likes of Stewart Downing and Tuncay Sanli.
Both players have been linked with moves away from the club in January.
Tottenham once again appear keen on landing Downing, whilst Chelsea are reported to have shown an interest in Tuncay.
But Pogatetz insists the club should not be selling either player.
"He (Downing) looks happy, and he played well against Arsenal and hopefully he will stay here," Pogatetz told Sky Sports News.
"It is important, those sort of players can make a difference, so hopefully we can keep them."