Diego Martín Alonso López (Spanish pronunciation: ; born 16 April 1975) is a Uruguayan professional football head coach and former player who played as a striker. He is the manager of the Uruguay national team.
Other than in his own country, he played football in Argentina, Spain, Mexico and China in a 16-year career, notably winning the 2001–02 Segunda División with Atlético Madrid while being crowned top scorer. He represented Uruguay at the 1999 Copa América.
Alonso began working as a coach in 2011, being in charge of clubs in Uruguay, Paraguay, Mexico and the United States and leading Pachuca to the 2016 Clausura and the 2016–17 CONCACAF Champions League titles. In December 2021, he was appointed at the Uruguayan national side.