Alexander Mronz (born 7 April 1965) is a former tennis player from Germany, who turned professional in 1987. Mronz played right-handed, and won one doubles title (1988, Schenectady) in his career. Mronz reached his highest individual ranking on the ATP Tour on April 8, 1991, when he became the World No. 73. Mronz also reached the third round of the 1994 Australian Open, losing from 2 sets up against former World No. 1 and three-time Australian Open champion Mats Wilander (who was currently in the process of coming back to the sport), 6–4, 7–5, 3–6, 4–6, 3–6.