Luis "Luigi" Díaz Barriga (born 9 April 1986) is a Mexican former professional tennis player.

Diaz Barriga competed mainly on the ATP Challenger Tour and ITF Futures Tour, both in singles and doubles.

He reached his highest ATP singles ranking, No.

461 on 16 July 2012, and his highest ATP doubles ranking, No.

233, on 2 May 2011.