Real Madrid are keeping tabs on Kieran Tierney at Arsenal this season.
The Scotland international has overcome an injury-plagued start to the campaign to work his way back into Arsenal's starting XI.
And Mundo Deportivo says Tierney's return has been welcomed by Real Madrid chiefs as they consider him a long-term signing prospect.
With captain Marcelo, 33, leaving at the end of the season, Tierney is being considered as a replacement.
The left-back has a deal with Arsenal to 2026.
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