## 4 Discussion  
The aim of the study is to determine the variables of the VAR system that have a direct effect on the match result, and the differences between the FIFA 2018 World Cup, the first tournament in which the system was used, and the 2020 European Football Championship. 2020 European Football Championship is the second largest tournament in which it was used VAR system. According to the main findings of the research, it has been determined that the second half time and total match time in the 2020 European Championship were significantly less compared to the 2018 FIFA World Cup. It was determined that there was a significant increase in the number of offsides in the 2020 European Football Championship. Our hypothesis was that there would be a decrease in the second half time and total match time and an increase in the number of offsides in the second international event where the VAR system was applied; this hypothesis has been confirmed. One of the biggest criticisms related to the VAR application faced before it was implemented was that the natural flow and spirit of the game would be negatively affected by technology [18; 19]. In the current study, the effect of VAR application on game time was found to decrease over time. Another concern with the natural flow of the game is that the increase in pauses in the game may have physiological and psychological negative effects on the referee and players [19; 20]. [PERSON] et al. [21] analyzed the effects of said technological innovation on technical and physical performance in the 2014 World Cup, where the VAR system was not implemented, and the 2018 World Cup, where the VAR system was implemented for the first time. They reported a decrease in the number of sprints with the VAR application. Although there are no findings on physical performance data in our study, the decrease in game time in the second use of the VAR system can be interpreted as a decrease in physical performance needs. When the literature is examined, no study has been found on the development of the use of the VAR application over time. However, there are many studies dealing with the effects of technical and physical parameters on the VAR application. There is an increase in the number and duration of pauses in the game [12; 13], and an increase in the first half, second half and total match time [21], despite the decrease in the number of fouls. It has been revealed that there is an increase in the number of cards [12]. It has been determined that there is a significant difference in the decision accuracy rate of the referees [6]. However, there are also studies examining the difference between the effects of the VAR application according to leagues. [PERSON] and [PERSON] [22], in their study in which they analyzed the effect of the VAR system in the Turkish Super League, found that the number of goals per match, the number of yellow cards, the number of red cards, the duration of the match and the duration of the ball in the game increased after the VAR. However, in another study in which in-game variables in the Spanish Football League were analyzed, it was determined that the VAR system did not significantly affect the variables other than offside [17]. [PERSON] et al. [9] revealed that after application of the VAR in the Chinese Super League, there was a decrease in the number of offsides and fouls, but a significant increase in the first half, second half and total game time. Based on all this data, it can be said that the effect of the VAR differs according to the organization and league. The fact that the VAR system was used for the first time at FIFA 2018 World Cup has brought about many speculations. There were those who believed that the application would bring justice, as well as those who believed that the duration of the game, its spirit and the pleasure of possible mistakes would be lost [18; 23]. While the VAR application was being implemented, it was very important for all stakeholders to understand the application rules and to get used to them.