Joao Fonseca had a Grand Slam debut to remember as he knocked out ninth seed Andrey Rublev in the first round of the Australian Open. The 18-year-old Brazilian thrilled the crowd as he caused the biggest upset of the tournament so far with a 7-6 (7-1) 6-3 7-6 (7-5) victory against Rublev. Fonseca was playing...

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