Andre Silva says Christopher Nkunku is keeping his own counsel amid reports that his fellow RB Leipzig forward has agreed to join Chelsea next summer.
France international Nkunku has scored nine goals this season, including four in his last three outings - one of them in last weeks' 3-1 win over Celtic in Champions League Group F.
Asked how his team-mate is handling the speculation, Silva replied: "Chris is not a team-mate who talks so much.
"I think he puts all the work on the pitch during games or in training and he is able to do things that come naturally and make it look easy.
"Chris is doing good and we hope he continues doing that."