An average professional tennis match lasts about 2 to 3 hours, although it can vary significantly based on the level of competition and the format of the match. For instance, Grand Slam matches can extend longer due to the best-of-five sets format for men. The match duration is influenced by factors such as the players' playing style, the surface type (grass, clay, or hard), and weather conditions. Matches can be much shorter if one player dominates with a straight-set victory.