Andrej Martin (Slovak pronunciation: ; born 20 September 1989, in Bratislava) is a Slovak professional tennis player who mainly plays on the ATP Challenger Tour. He achieved a career-high ATP singles ranking of World No. 98 in July 2016 following runs to the third round of the French Open and the final of Umag.
He was a lucky loser at the French Open and defeated Daniel Muñoz de la Nava in the first round of the main draw and 29th seed Lucas Pouille in the second, before losing to 8th-seed Milos Raonic in the third round.
In July 2016, Martin reached first ATP final, in Umag, defeated Martin Klizan, Joao Sousa, Carlos Berlocq and Sergiy Stakhovsky en route. In the final he lost to Italian No. 1 Fabio Fognini. Later in the year, Martin participated in the 2016 Summer Olympics. After comfortably defeating Denis Kudla in the first round, Martin got a walkover into the 3rd round when opponent Philipp Kohlschreiber withdrew with an injury. However, Martin was then comfortably beaten by the 4th-seeded Kei Nishikori, 2–6, 2–6.