Sloane Stephens fired a parting shot in Emma Raducanu 's direction as she exited the Australian Open on Tuesday, warning the Briton she has "a lot to learn" about tennis etiquette.
Raducanu emerged on the winning side of a three-set war and advanced following her 6-0, 2-6, 6-1 triumph, marking a hugely successful debut in Melbourne against stiff opposition.
Stephens, 28, knows all too well the pressures that come with attempting to break through as a prodigy, having herself turned professional at the age of 16 back in 2009.
But her rise wasn't quite as meteoric as that of Raducanu, who won the U.S. Open in September, two months before her 19th birthday, while Stephens was 24 before she clinched her sole Grand Slam at Flushing Meadows.
