Andriy (Andrei) Medvedev (Ukrainian: Андрій Медведєв, born 31 August 1974 in Kiev), is a former professional tennis player from Ukraine. Andriy is the Ukrainian language spelling of his first name, while Andrei is the Russian language spelling of his first name, with both regularly used. Medvedev made a splash on the international tennis scene when, as a 17-year-old, he won titles in Genoa and Stuttgart. His most successful tournament was the Hamburg Masters (formerly the German Open), which he won three times (1994, 1995 and 1997). He reached a career-high singles ranking of World No. 4.
In the late 1990s, Medvedev's form and results began to flounder until he unexpectedly reached the final of the 1999 French Open after having defeated Pete Sampras and Gustavo Kuerten en route. Medvedev dominated the first two sets of the final against Andre Agassi before Agassi mounted a come-from-behind victory, which allowed him to complete a career Grand Slam. Afterwards, Medvedev did not score further notable results, and retired from the tour in 2001.
One main rival of Medvedev's was Sergi Bruguera. While their head-to-head record ended deadlocked at 5–5, Bruguera was able to win their two most important matches — the semi-finals and quarter-finals of the 1993 and 1994 French Opens respectively, with Bruguera winning both matches in straight sets. Medvedev lost six times to the eventual French Open champion (1992–95, 1997 and 1999).
Medvedev's junior career was the highlighted by winning the junior 1991 French Open.