Adrián Mateos Díaz (born 1 July 1994) is a Spanish professional poker player.

At the age of 19, he won the 2013 World Series of Poker Europe Main Event for €1,000,000.

In May 2015, Mateos won the European Poker Tour Grand Final in Monte Carlo, earning €1,082,000.

[3] He won his fourth WSOP bracelet in the 2021 $250,000 No Limit Hold'em - Super High Roller.

An "E" following a year denotes bracelet(s) won during the World Series of Poker Europe Beginning in 2017 the tournament was moved to the PokerStars Championship.