> Both are sports for rich (countries) only. How many tennis players you know are from Africa?
I don't think this matter.
Most people have ever heard of at least one of the grand slam Tennis tournament that happens every year: Wimbledon, US Open, Rolland Garros or Australian Open. Same for Golf, in my case I can name the British and US Open. In cycling, most people not even interested in it can name the Tour de France. Everyone knows the NBA basketball league, the Soccer World Cup and a number of majors teams from the UEFA and/or their own continent.
Volleyball? I don't think there is any major tournament broadcasted and advertised all over the world. You only really hear about it during olympics alongside a number of other collective and individual sports.