That came just after pre-tournament favourite Serena Williams, chasing a record-equalling 24th Grand Slam singles title, was knocked out by Wang Qiang.
Wang won just 15 points when the two last met at the US Open, but she dialled in to beat Williams 6-4 6-7 (2-7) 7-5 and reach the fourth round.
And then Roger Federer capped the day by somehow coming through a five-set thriller against John Millman.
That’s all without mentioning Caroline Wozniacki bringing an end to her sterling 15-year career.
Meanwhile, Greek Stefanos Tsitsipas added to the shocks when he fell in straight sets to former Wimbledon finalist Milos Raonic of Canada.
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