Tennis purists felt unsettled as Danielle Collins went right at a rowdy Australian crowd after taking out a hometown favourite in incredible scenes. But the exchange is actually healthy for the sport.

Danielle Collins was involved in a heated exchange with fans during her Australian Open second-round win over Destanee Aiava, with the American telling them to "shut up".

Danielle Collins got into a back-and-forth with a booing crowd at the Australian Open after eliminating a local player, blowing kisses to the spectators and repeating the phrase, “How about that?!”