Australian Open LIVE: Novak Djokovic rages at umpire as Emma Raducanu injury fears raised

There have already been a few upsets at this year's , with a reigning Olympic champion the latest to suffer a surprise defeat.

Qinwen Zheng, who reached the final of last year's tournament, was dumped out by Laura Siegemund in straight sets overnight. It comes after Andrey Rublev was overpowered by Brazilian teenager Joao Fonseca on Tuesday.

managed to avoid the same fate against Jaime Faria, with the Serb pulling through in four sets to book his place in round three.

Plenty of British players will be in action later on Wednesday, with Jodie Burrage going up against Coco Gauff and Harriet Dart facing Donna Vekic.

will also continue his campaign against Thanasi Kokkinakis as he seeks another deep run at a Grand Slam, having reached the US Open semi-finals last year.

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