Neil Taylor will miss Swansea City's match at Leicester City after asking to play for the club's Under-23 side.
Having lost his place to Stephen Kingsley, Taylor wants to improve his fitness ahead of Wales' World Cup qualifier against Moldova on 5 September.
The left-back will play for Swansea's Under-23s against West Ham on Friday.
"I like that attitude because he understands now he is not ready," said Swansea head coach Francesco Guidolin.
"He asked me yesterday if he could play with the Under-23s on Friday because he is a little bit behind because he came from a long tournament in the Euros.