Football in Brazil is number one. A no brainer, actually.
Volleyball has become very popular in the last 30 years, to the point it's our second sport. No question about it either.
Our third most popular sport would be very hard to pick. Strong candidates for the third spot would be futsal, beach soccer, beach volleyball, judo, swimming, surfing, basketball, cycling, boxing, table tennis, skateboarding, handball or athletics. It might be incredible for some, but there is also a big number of girls who practice rhythmic gymnastics (some schools in big cities offer rhythmic gymnastics programs, but almost all of them are amateur at best), but of course it's not even in the top 10 (still, it's miles ahead of wrestling or weightlifting, two virtually unknown sports in Brazil).
Besides, we have capoeira (a mix or martial arts, dance and gymnastics created by African slaves) and footvolley (a mixture of football and volleyball played on the beach).