LONDON, Great Britain - No.2 seeds Elena Vesnina and Ekaterina Makarova remained on course as the highest seeded team remaining in the ladies' doubles draw at Wimbledon on Monday, as they advanced to the last eight with a 6-4, 6-4 win over No.15 seeds Andreja Klepac and María José Martínez Sánchez.
The Russians, runner-ups at the 2015 Wimbledon Championships, were joined in the quarterfinals by five other seeded teams - and two unseeded surprises, including a precocious pair of teenagers.
In the quarterfinals, Makarova and Vesnina will face No.8 seed Ashleigh Barty and Casey Dellacqua, who booked their spot in the last eight with a 6-1, 7-6(6) win over Elise Mertens and Demi Schuurs.
The Aussie duo, who saved a match point in their previous round, served for the match at 5-3 in the second set, but eventually needed a tiebreak to see things through.
In a matchup between former partners who claimed the title together, No.3 seeds Martina Hingis and Chan Yung-jan defeated No.13 seeds Sania Mirza and Kirsten Flipkens, 6-2, 6-4.
They will face the veteran duo of Anna-Lena Groenefeld and Kveta Peschke, the No.12 seeds, who scord one of two three-set victories on the day over No.7 seeds Julia Goerges and Barbora Strycova, 6-3, 6-7(5), 6-2.
Also advancing in three sets were No.9 seeds Chan Hao-ching and Monica Niculescu, who put an end to the run of one of the Cinderella stories of the tournament - Ana Konjuh and Beatriz Haddad Maia - with a 6-7(2), 6-3, 6-4 victory. The Croat and the Brazilian had scored a pair of three-set upsets en route to the third round, and looked on couse for a third before the No.9 seeds rallied from a set down and pulled out the win late in the decider.
Three unseeded teams will also feature in the last eight, beginning with Svetlana Kuznetsova and Kristina Mladenovic, who scored a three-set upset of No.4 seeds Timea Babos and Andrea Hlavackova.
The Russian and French duo, who have three women's doubles Grand Slams between them, will face surprise packages Makoto Nimomiya and Renata Voracova for a spot in the semifinals, as they ousted No.5 seeds Lucie Hradecka and Katerina Siniakova, 6-4, 6-4.
Kuznetsova, who reached the singles quarterfinals for the first time in 10 years earlier in the day on Friday, also reached the last eight in both disciplines in 2007 and was a Wimbledon doubles runner-up in 2005.
"If you're in quarterfinals of Grand Slam, you made something work," Kuznetsova said after beating Agnieszka Radwanska in singles. "It's not free. You know, they don't give you presents to be in quarterfinals. You've got to deserve and take your opportunities."
Rounding out the field are debutants CiCi Bellis and Marketa Vondrousova, who defeated the Ukrainian duo of Lesia Tsurenko and Lyudmyla Kichenok, 6-4, 6-2, to continue their breakout tournament. The teenaged duo takes on Chan Hao-ching and Niculescu for a spot in the last four.