Title: Tempo of tennis play at French Open 2017 Objectives: Goal of this thesis is to find out, what is the tempo of men's tennis play at French Open 2017, compare individual tempos at individual sets after first and second service and also compare tempo of tennis play during 1st and 2nd round to quarter and semifinal matches. Methods: Basic method of this work is indirect observation. From available video records of 10 tennis plays at French Open 2017 tournament we measured length of the rally, number of hits, length of the break and tempo of the play. Notation analysis was performed based on data gathered from this observation. Results: Average tempo of play is 1,34 seconds. Average rally length is 7,18 seconds and average number of hits for rally is 5,36. Time required to start another rally is 22,2 seconds. After second service, number of hits increase dramatically and break time between rallys is increased. Keywords: Tennis, French Open 2017, tempo of tennis play, time, rally, clay