Club Brugge manager Philippe Clement has sent a warning to Percy Tau and Emmanuel Dennis ahead of the second half of the Belgian season.
Both Tau and Dennis has attracted reported interest in the January transfer window after several standout displays in the Belgian top-flight this season.
However, neither of the forward's were available for full training during their winter-break preparations in Doha that has since been completed.
Speaking to Het Nieuwsblad, Clement confirmed several players will return to Brugge in peak physical condition.
But Tau and Dennis have been warned they run the risk of missing out on selection against Vincent Kompany's Anderlecht on Sunday.
"Dennis has some aches and pains, just like Tau," Clement said before they departed Qatar. "They did not train everything and that is a disadvantage.
"If they are fit again, they will have to catch up with their training to qualify for competitions.
"Because these are very important weeks now to lay a foundation [for the title]."
Brugge currently leads the Belgian First Division A, 10 points ahead of second-placed Charleroi after 20 games played.