Ethan Ampadu started and played 76 minutes of Wales' second World Cup group game against Iran on Friday morning in Qatar.
The 22-year-old impressed in Monday's draw with the USA and has become an integral member of Rob Page's hard-working squad.
Wales suffered heartbreak with a 98th-minute Iranian winner by Rouzbeh Cheshmi after a Wayne Hennessey red card. Iran then sealed victory with a Ramin Rezaeian chip on the break.