Serena Williams loses after suffering ankle injury on match point

Serena Williams experienced a terrible sequence late in her quarterfinals match with Karolina Pliskova at the Australian Open and ended up blowing a huge lead.

Williams rallied back from down a set and down a break in the second to win the second set and power through to a 5-1 lead in the third. She was up 40-30 and serving for the match when she was called for a foot fault on her first serve. Then on her second serve, Pliskova took control and wrong-footed Williams to send it to deuce.

Serena's ankle giving her a bit of trouble.

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Serena rolled her ankle pic.twitter.com/gY4WHUS85g

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Williams twisted her left ankle as she tried to abruptly change direction to chase down a shot from Pliskova. She was noticeably off after that and double faulted before losing the game. Pliskova then went on to win the next six straight games to flip the match as Williams did not seem to be at full strength. Pliskova won 6-4, 4-6, 7-5, winning six games in a row to take home the match and advance to the semis.