Schalke duo Klaas-Jan Huntelaar and Benedikt Howedes believe Lewis Holtby would be a useful addition to their side, were he to return this January.
Goal exclusively revealed earlier this month that the Tottenham midfielder was in talks with Schalke - and Huntelaar and Howedes believe the signing would add a lot to the Bundesliga outfit.
"Holtby would help us," Huntelaar said in BILD.
"Lewis has quality and Schalke can use him very well. He can play in midfield at almost all positions - in the offensive and the defensive."
Schalke captain Howedes added: "He is a good player, if it fits for both clubs, it would help us in any case."
Meanwhile, Holtby's agent Marcus Noack hinted that a move back to Germany would be favourable following a successful first spell at the club for the 23-year-old.
"Lewis has felt very well at Schalke," Noack said.
"I am struggling to find a good solution for Lewis so he is happy again. The important thing is for him to play."
Holtby has made 21 appearances for Spurs this term, although only 12 of them have come in the Premier League.