Tottenham face a battle to keep hold of Sergio Reguilon this summer.
The left-back is in his second season with Spurs after his arrival from Real Madrid.
The deal included a buy-back option and Real are now weighing up whether to trigger it at season's end.
Ok Diario says Real chiefs have been impressed by Reguilon's progress and are keen to strengthen their left-back options.
The sale of Ferland Mendy isn't off the table and should the France defender leave, Reguilon will feature high on potential replacements.
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