The purpose of this study is to investigate the response of a sports drink protocol on fatigue during repeated singles tennis match play in a placebo-controlled, double-blind crossover study. Eight well-trained tennis players participated in this study. Notational analysis, match intensity, perception of the effort, speed, agility, aerobic endurance, heart rate, blood glucose levels and neuromuscular fatigue were investigated before and after each tournament. The sports drink protocol had a positive effect on the players' perceived efforts, the latter felt less general and muscular fatigue. Moreover, higher game intensity, higher blood glucose levels, higher average heart rate and less fatigue on the triceps brachii after the matches were observed with the sports-drink protocol.
