The 23-time grand slam winner departed the Australian Open at the quarterfinal stage in dramatic circumstances. The 37-year-old American, going for a record-equalling 24th Grand Slam singles title, led 5-1 in the decider but lost 6-4, 4-6, 7-5 in Melbourne.
"I think she just played lights out on match points," Williams said.
Pliskova who won on her third match point said, “I took my chances”.
Serena even said that she ‘did not choke’ after missing four match points as Czech seventh seed Karolina Pliskova won the final six games to win a dramatic Australian Open quarter-final.
Pliskova will be playing in the Australian Open semi-finals for the first time and is one victory away from appearing in her second Grand Slam final, following defeat by Germany's Angelique Kerber in the 2016 US Open.
Pliskova had led by a set and a break at 3-2 before the momentum swung to Williams and victory appeared a formality after she won nine games out of 10 and set up a match point. But the momentum then again swung back to Pliskova in a chaotic encounter. Pliskova said, “I was almost in the locker room but now stand here as the winner”.
About her semi-final opponent she said, “Naomi Osaka is dangerous but there is nobody more dangerous than Serena”.