Jupp Heynckes has played down reports suggesting Swansea City are keen to bring Renato Sanches' loan switch from Bayern Munich to an end.
The 20-year-old has failed to adapt to life in the Premier League and has not scored in his ten appearances for the Swans, who are currently at the foot of the table and 1/2000 to be relegated this season.
Sanches struggled to impress in his first season at Bayern following his big-money switch from Benfica 18 months ago, after he had produced several thrilling displays for Portugal at Euro 2016.
Swansea boss Paul Clement has not picked Sanches since the 2-1 loss at Stoke City a fortnight ago and has hinted that the player could be heading back to Germany.
However, speaking to reporters ahead of Bayern Munich's Bundesliga clash with Stuttgart, Heynckes said: "All I can say is this; I know Portuguese football from my time at Benfica.
"I know how good their youth work is, but Sanches has made only a few games for the professional side.
"I assume Renato has spoken to Hasan Salihamidzic [Bayern's sporting director]. I have in recent weeks - it was mentioned about him coming back during the winter break but we are very well-stocked in midfield.
"I think he is a very great talent, but talents need the discipline to work daily on their game to become a team player and get integrated. They also need firm leadership."
Bayern are 1/1 to beat Stuttgart this weekend and 1/2000 to triumph against Besiktas in the last 16 of the Champions League in February.
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