New Zealand tennis No.1 Marina Erakovic's run at the ASB Classic in Auckland is over, beaten in the second round of the doubles.
Erakovic and her Puerto Rican partner Monica Puig lost to the second-seeded Czech pairing of Lucie Hradecka and Andrea Hlavackova, 6-7 6-3, and then lost the super tie breaker 10-5.
Erakovic had previously lost her opening singles match to fourth seeded Czech Barbora Zahlavova Strycova.
Strycova has now advanced to the semis, beating American Coco Vandeweghe in straight sets in the singles quarter-finals.
She'll play top seed Caroline Wozniacki, who beat Germany's Julia Goerges 6-4 6-4 to advance to the final four.
American great Venus Williams also beat Russia's Elena Vesnina in straight sets, though Vesnina caused the seven-time grand slam champion a few problems.
The American started their clash well, taking the opening set 6-2 - but early in the second, the third seed dropped her powerful serve for the first time here, before the pair played out an epic sixth game. It lasted 18 minutes and saw 12 deuces before Vesnina claimed it.
That only seemed to rile Williams up - she then stormed home with two service breaks to close the set and the match out, 6-4.
Williams will face her compatriot Lauren Davis in the semis, who staged another three-set comeback to knock out Polish qualifier Urzsula Radwanska 2-6 6-2 6-1.