MADRID -- Trent Alexander-Arnold was substituted just five minutes into Real Madrid 's Champions League game with Marseille on Tuesday, after suffering an injury.

The right-back went to ground two minutes earlier at the Santiago Bernabéu, holding his thigh, after a spell in possession.

- Champions League live updates as Real Madrid host Marseille

Alexander-Arnold -- who joined Madrid from Liverpool in the summer -- was replaced by club captain Dani Carvajal .

The England international has started three of Madrid's five games in all competitions so far this season, with Carvajal preferred in the other two.

"It's a really good competition [between the two players]," coach Xabi Alonso said last month. "I like having that in each position, two players who want to show what th

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