This single-case study examines the influence of social media practices on tennis players’ physical behaviours in the context of Swedish tennis club. Through semi-structured interviews with tennis club members, the research aims to understand how social media practices impact tennis players’ physical behaviours. The study draws on theoretical frameworks that highlight social media’s influence on both the production and consumption of content, which can shape tennis players’ physical behaviours. The findings reveal that social media practices affect tennis players’ physical behaviours. Firstly, these practices can lead to changes in coaching approaches as coaches adapt their strategies and techniques based on social media trends and feedback. Tennis players may develop new habits influenced by what they observe and engage with on social media platforms. Additionally, social media practices can impact tennis players’ societal position, influencing their interactions with others and potentially affecting their social dynamics within the sports community. In conclusion, this study emphasizes the importance of considering social media practices beyond online engagement and their impact on physical behaviours. The findings provide valuable insights for sports organizations aiming to develop strategies that promote positive social media practices among tennis players while mitigating negative influences. Moreover, the study contributes to the research field by exploring the influence of social media practices on tennis players’ physical behaviours in offline settings. Researchers interested in further investigating this topic can draw upon the methodology and findings of this study as a guide for their own investigations.