How do you solve a problem like Maria? Tennis' battle with grunters

    Story highlights

    • Agnieszka Radwanska has criticized Maria Sharapova for grunting during matches
    • World No. 4 Sharapova has defended the noises, saying they are not against the rules
    • The WTA is attempting to coach grunting out of the next generation of talent
    • Victoria Azarenka