For a professional who follows tournament circuit, strong serve punches are very special capital. In reality, technically the quality of blows is often inadequate. Serve punches that are carried out are very easily returned by the opponent and also do a lot of wrong serve (fault). This experimental study aims to determine the effect of training methods, forms of exercises stretching and grip strength on the flat serve skills of tennis. This research was conducted at the Faculty of Sport of the Universitas Sebelas Maret Negeri Surakarta (UNS) in 2019. The experimental method used a 2x2x2 factorial design. The sample consisted of 80 students divided into 8 groups, each consisting of 10 students. The data analysis technique was a two-way analysis of variance (ANOVA) and continued with the Tukey test at the significance level α = 0.05. The results showed that: (1) there are significant differences between training methods overall with training methods section of the skills of serve flat tennis courts, (2) there are significant differences between the forms of exercises stretching static form of exercises stretching dynamically to a skill Served flats tennis the field, (3) there is a significant difference between the grip strength above the average grip strength below the average to the flat serve skills of tennis court. It can be concluded that the two types of training methods have different effects on the flat serve skills of tennis court when it is associated with forms of exercises stretching (static and dynamic) and the use of different grip strengths that are above average and below average.