Nobody knows the economic impact of the 2016 Rio Olympic Games. But a recent report published by promotion company London & Partners International indicates hosting major sporting events has contributed more than $2.1 billion to London's economy since that city's 2012 Olympics and Paralympics

The battle for medals is raging in Rio, but the Big Apple is bracing for big-name tennis as the US Open comes to Flushing, New York. The summer juggernaut of racquet sports brings in tourism, media coverage and big numbers in all of them.

When an Olympic athlete, whether a swimmer, team handball or water polo player, is ready to travel, he or she hops a plane. But there's a whole other segment of the athlete market that also needed to fly, and its mode of travel was more complex than you'd imagine.

Skateboarding, it seems, just can't play nice. Despite being named a new Olympic medal sport for 2020, the sport is plagued by infighting and backbiting. Is this how it rolls, or will it overcome its growing pains in time to work with the IOC?

Not even a wall around the U.S. would stop this threat. Miami is the latest area of concern for the Zika virus, following the diagnosis of several cases in a neighborhood in the area. CDC personnel are already on the ground and more are arriving daily.

Jai-alai was the roller disco of its time: hot and happening, particularly in Florida. These days, it struggles to find players, much less an audience. What happened to the sport that was the toast of the Southeast and where did all those athletes go?