Mahesh Bhupathi

Wimbledon 2014 will be my last slam. To be honest, I am already starting to miss professional tennis, having played at the highest level for two decades. It is what has given me my identity, and I will miss every bit of the action. The thought that I will not be playing anymore is daunting.

It's not just the physical aspect of boxing, it's the whole fighter mentality that has been ingrained in me through the years as a competitive athlete. One of the hardest things you'll ever do is to box - to get into the ring and to face off with somebody whose whole goal is to knock you out, to hurt you, and to be able to fight back.