Juan Manuel Díaz Martínez (born 28 October 1987) is a former Uruguayan footballer.
In January 2010, Club Atlético River Plate signed the Uruguayan wingback from Estudiantes.
[4] On 8 July 2016, Diaz signed a two-year contract with Super League club AEK Athens for an undisclosed fee.
[7] Díaz also capped for Uruguay U-20 at 2007 South American Youth Championship and 2007 FIFA U-20 World Cup.
On July 27, 2010 he was reserved to play a friendly match with Uruguay first team against Angola in Lisboa .