Cibulkova did her best to hang on but was left chasing shadows as Ostapenko blasted a backhand victor on her first match point to become the only woman to reach the semis without dropping a set in this year's tournament.
Camera IconDominika Cibulkova of Slovakia speaks to a match official after a line call during the women's singles match against Su-Wei Hsieh of Taiwan on the seventh day at the Wimbledon Tennis Championships in London, Monday July 9, 2018.
"It never happened to me that the umpire changed the decision", Cibulkova said. "It was really ridiculous for me". 'It never happened to me in my career that this would happen.
Cibulkova, ranked No 32 in the world, was not awarded a Wimbledon seed because the All England Club committee wanted to hand Williams, who returned from giving birth to her first child at the beginning of the year, the privilege.
The Slovakian's patience was tested again when a backhand she struck onto the baseline was called out.
But what really got Cibulkova offside with the crowd was her unwillingness to intervene, standing in the advantage court as if the point should have been awarded to her even though the play should have been replayed.
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After seven minutes, the decision was finally changed and the point replayed. "It's great to be in the semis", Ostapenko said, beaming after beating Cibulkova for the first time in three attempts.
"It really messed with me, then I tried to just calm down, to play my game".
It was a thoroughly destructive performance from the Latvian, who has already proved her shock French Open triumph last summer was no fluke.
"That code violation made me even more motivated and angry", Ostapenko said. I had no sympathy [for Hsieh] because the argument is just about the chair umpire."I'm a fair player".
When Jelena Ostapenko walked on to Wimbledon's Court One on Tuesday, it appeared as if she was facing an identikit opponent - both had their hair tied back into neat ponytails and wore white headbands and wristbands.
Cibulkova insisted after the match that the call should've remained in her favor. "In this tournament, she seems to be in the right mood".