The sports industry is made up of athletes who have struggled through their lows and celebrated through their highs. As a result, athletes of any sport are always aware of another athlete's physical and mental stress.
It's not easy being the Serena Williams of tennis or Alex' A-Rod' Rodriguez of baseball, but they have done it and climbed to the top despite the innumerable obstacles that stood in their way.
Considering Rodriguez knows the stress of being a top athlete in a sport, he took to social media to celebrate Serena Williams in 2016.