In pictures: Pliskova's stunning comeback over Serena
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A fully dialled-in Williams won nine of the next 11 games from 4-6, 2-3 down to take a 5-1 lead in the deciding 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.