This week's Collector Swedish Open is just the third WTA tournament this century to have no seeds make the quarterfinals. What are the other two?
WTA Staff

No.2 seed Anastasia Pavlyuchenkova went down on Monday, four more seeds including No.1 seed Alizé Cornet were sidelined on Tuesday, and with Wednesday's elimination of three more seeds at the Collector Swedish Open, the event became just the third this century to not have any seeded players make the quarterfinals. Here is a rundown of each occurrence and what round each seed lost in:

2009 Hobart (won by Petra Kvitova)
No.1 seed Flavia Pennetta: 2r
No.2 seed Patty Schnyder: 1r
No.3 seed Anna Chakvetadze: 1r
No.4 seed Zheng Jie: 2r
No.5 seed Agnes Szavay: 1r
No.6 seed Aleksandra Wozniak: 1r
No.7 seed Alona Bondarenko: 2r
No.8 seed Tamarine Tanasugarn: 1r

2012 Bogotá (won by Lara Arruabarrena)
No.1 seed Marina Erakovic: 2r
No.2 seed Alexandra Dulgheru: 1r
No.3 seed Romina Oprandi: 2r
No.4 seed Jelena Dokic: 1r
No.5 seed Gisela Dulko: 2r
No.6 seed Mathilde Johansson: 1r
No.7 seed Lourdes Domínguez Lino: 2r
No.8 seed Patricia Mayr-Achleitner: 1r

2014 Bastad
No.1 seed Alizé Cornet: 1r
No.2 seed Anastasia Pavlyuchenkova: 1r
No.3 seed Camila Giorgi: 1r
No.4 seed Yaroslava Shvedova: 1r
No.5 seed Anna Schmiedlova: 1r
No.6 seed Annika Beck: 2r
No.7 seed María-Teresa Torró-Flor: 1r
No.8 seed Polona Hercog: 1r