Seeds tumble in Winston-Salem

Four of the eight quarter finalists were decided on Day 3 of the Connecticut Open in New Haven.

The tightest of the second round matches was that contested between Daria Gavrilova and Timea Babos.

Babos had caused the first round upset of fourth seed Mladenovic, and despite winning less a percentage of points on her serve than Gavrilova in set one, the Hungarian created five break points.

However Gavrilova broke twice from her four chances, while Babos could only convert once, allowing the Australian to take the opening set 7-5.

Set two was even closer, with percentage of points won on serve almost identical.  Gavrilova, though, had eight opportunities for a break - twice as many as her opponent.  Both eventually broke twice, causing a tie break.

Gavrilova outlasted Babos 8 points to 6 to win the tie break and the match 7-5 7-6 (6).

The quarter final opponent for Gavrilova will be the winner of two qualifiers, Kirsten Flipkens or Ana Bogdan, the latter having ousted fifth seed Elena Vesnina in the opening round.

Other known quarter finalists are:

Aga Radwanska (1) - defeated Genie Bouchard after receiving a first round bye.

Shuai Peng (8) - knocked over Mirjana Lucic-Baroni in straight sets, following a three set struggle against Siniakova in round one. Will play Radwanska in the final eight.

Elise Mertens - qualifier who beat Bertens in round one and Kasatkina in round two, both ranked ahead of her. Mertens will meet the winner of qualifier Magda Linettte and unseeded Shuai Zhang, the player responsible for Kvitova's exit.

Second seed Dominika Cibulkova is yet to play a match, and will do so on Day 4 - a second round encounter with Alize Cornet after an opening round bye.

Cornet is dangerous considering her 6-0 6-0 demolition of Yulia Putintseva in round one.

In North Carolina, the. Winston-Salem Open has reached the round of sixteen and these are the matches for decision:

Roberto Bautista Agut (1) v Marcos Baghdatis - Baghdatis defeated 16th seed Jiri Vesely

Taylor Fritz v Paolo Lorenzi (7) - Fritz defeated 10th seed Yuichi Sugita

John Isner (3) v Borna Coric (14)

Andreas Seppi v Jan-Lennard Struff - Seppi beat 12th seed Aljaz Bedene and Struff beat 5th seed Pablo Cuevas

Steve Johnson (6) v Carlos Berlocq - Berlocq defeated 11th seed Viktor Troicki

Kyle Edmund v Marton Fucsovics - Edmund beat 15th seed Daniil Medvedev and Fucsovics beat 17th seed Joao Sousa 

Horacio Zeballos v Damir Dzumhur - Zeballos beat 8th seed Fernando Verdasco and Dzumhur beat 9th seed Gilles Simon

Hyeon Chung (13) v Julien Benneteau - Benneteau defeated 2nd seed Pablo Carreno Busta

Only six of the sixteen seeds have made the final sixteen, which is not a good sign for the upcoming US Open, when match practise is what these players were looking for, coming into this tournament.