In pictures: Pliskova's stunning comeback over Serena
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Karolina Pliskova struck first, breaking Serena Williams in the third game while not facing a break point on her own serve through the first set (Getty)
Karolina Pliskova saved four match points to mount an astonishing comeback against Serena Williams to make her first Australian Open semifinal. Check out all the best pictures from a thrilling contest.