Alberto Martín Magret (born August 20, 1978 in Barcelona) is a tennis player from Spain, who turned professional in 1995.

Martin's best Grand Slam performance was reaching the fourth round of Roland Garros in 2006. En route to this performance, Martín's first round win was his first victory over former World number 1 Andy Roddick in their fifth encounter. Martín led by two sets when Roddick retired with an ankle injury. Martín also beat Lleyton Hewitt in the first round where Hewitt was seeded first at the 2002 Australian Open, 1–6, 6–1, 6–4, 7–6 (4). However, Hewitt had been recovering from chickenpox at the time of his victory.

Martin also has the sad distinction of having suffered the heaviest defeat in the history of the Australian Open. Andy Murray beat him in the first round of the 2007 tournament, 6-0, 6-0, 6-1. In fact, Martin had to wait until the penultimate game of the match before winning his only game.