Grunting on the tennis court has long sparked debate, but some of the sport’s biggest names insist it is instinctive rather than intentional. Maria Sharapova says she has grunted since childhood and never planned it, while Victoria Azarenka maintains it is simply part of expressing herself on court, noting that men grunt too

Sharapova, a former World No.1 won five Grand Slam titles during a career that spanned over a decade. Meanwhile, the Bryan twins won a record 16 major titles in men’s doubles. They spent 438 weeks as the No. 1 doubles pair