This paper addresses the influence of EMS haptic feedback on the physical and tactical behavior of players in a VR multiplayer boxing fight with live motion capturing. A custom prototype was developed, using Unity, the Teslasuit and a Photon PUN 2 cloud server. A within-subjects user test with a mixed-methods approach was conducted, collecting quantitative and qualitative data in EMS-enabled and EMS-disabled conditions. The analysis of the data showed heterogeneous user responses with some participants showing an increase and some participants showing a decrease in their recorded metrics. In general, EMS feedback led to increased tactical decision-making, enhanced realism and a stronger sense of embodiment. Statistically significant differences were found primarily among participants with increased recorded values under EMS-enabled condition. These differences were found in punch counts, movement range, covered area and body orientation metrics. Most players showed an increase in their defense. As the results showed to be highly dependent on individual factors, a generalization of the results is limited.