My parents put me into individual sports such as golf and tennis. When I was young, my mom took me to the driving after school and I took lessons or practice for two hours. I didn't have to rely on anyone other than my mother to drive me back and forth. The same with tennis, I took private lessons and the coach had me practice with other students of his. When I competed in tournaments, I got in touch with players from tournaments and practiced with them when we were not competing. The schedule worked out great for both myself and my mother.
Tennis can be a team sport. My son plays on a JTT team and his school's high school team as well. No, you are not playing as a team (except to the limited extent that you play with another player during doubles matches), but there are team practices and the matches occur at set times that the team (or at least the top 6 players) participates in.