Champion Yanina Wickmayer joined top seed Maria Sharapova in the quarters of the Auckland Classic on Wednesday, while Svetlana Kuznetsova squandered a three-games lead in the final set and crashed out.
Sharapova won 6-3, 7-5 over Renata Voracova of the Czech Republic, while second seed Wickmayer had to battle to beat German qualifier Sabine Lisicki 6-2, 3-6, 6-2.
Third seed Kuznetsova was bundled out 2-6, 6-4, 6-4 by China's Peng Shuai after blowing a match-winning lead in the final set in the first match on centre court.
"The only person I can blame is me because I was leading all the time," Kuznetsova said. "The first set I won easy, the second set I got a break and when you don't take chances, your opponent will."