Real Madrid are concerned about the injury sustained by Trent Alexander-Arnold in Wednesday's LaLiga win at Athletic Club , sources have told ESPN, with the England defender set to undergo tests to determine the extent of the problem.

Alexander-Arnold was delivering one of his best performances in a Madrid shirt to date -- his cross-field pass setting up Kylian Mbappé 's opening goal -- when he was withdrawn in the 55th minute of the 3-0 victory at San Mamés, and replaced by substitute Raúl Asencio .

The right-back appeared to suffer a muscular problem after kicking the ball upfield, limping on the sidelines before asking to be withdrawn.

Midfielder Eduardo Camavinga was also substituted with an ankle problem, although the issue is thought to be less serious, sources said.

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