Serena Williams crashes out of the Australian Open

Tennis giant Serena Williams has crashed out of the Australian Open after a devastating upset against Czech star Karolina Pliskova. 

World No. 8 Pliskova saved four match points to send the seven-times champion packing in a heated final set after a more than two hour long showdown at Rod Laver Arena.

Seventh-seeded Pliskova rallied from 5-1 down in a tense deciding set to advance to her first semi-final at Melbourne Park with a 6-4 4-6 7-5 victory over the American on Wednesday.