Watford left-back Pervis Estupinan is a target for Europe's biggest clubs.

The Daily Express says Estupinan could be the centre of a bidding war between Barcelona, Chelsea and Tottenham this summer after his club was relegated to the Championship.

The Ecuadorian defender joined Watford in the summer of 2016 but was instantly farmed out on loan.

The fact that he is yet to play a single minute for the Hornets means it's plausible that even some Watford fans might not recognise his name.

But Estupinan is on track to become one of the game's finest in his preferred position of left-back and is attracting attention from some of the world's biggest clubs.

They report that Chelsea, Tottenham and none other than Barcelona are keeping a very close eye on the 22-year-old.