Leeds United manager Marcelo Bielsa says Tyler Roberts will learn from his mistake after being sent home from the Wales squad for breaching protocols.
Roberts, Rabbi Matondo and Hal Robson-Kanu were released ahead of the World Cup qualifying win over Czech Republic.
Robson-Kanu's West Bromwich Albion boss Sam Allardyce said he thought it was a "minimal" mistake.
"It's just one of those things where you just slightly break what you should be doing by meeting somebody you shouldn't," Allardyce said.
"They [Wales] decided it was enough to send him back. He has been tested [for Covid-19] and he has got a negative test.