3 retirements in Stuttgart

Quarter finals have been reached in all four tournaments being contested on the WTA and ATP tours this week.

Stuttgart 

Sadly, three matches were decided by retirements.

Angie Kerber suffered a thigh injury and dropped out 6-0 2-0 to Anett Kontaveit 

A back problem caused Garbine Muguruza (2) to withdraw after trailing 7-5 to Anastasia Pavlyuchenkova

Kontaveit and Pavlyuchenkova will play each other in the quarter finals

Elina Svitolina (3) led qualifier Marketa Vondrousova 2-6 6-1 3-2 before the Czech player gave Elina a free pass to the quarters thanks to a leg complaint.

Other round of sixteen matches were resolved as expected but Caroline Garcia (6) had the most problems, taken to three sets by 15 year old qualifier Marta Kostyuk, ranked 158.  The Ukraine player was all at sea in the opening set, winning just 10 points and leaving Garcia ahead 6-1.

However, her fight in set two was admirable, winning 19 of 22 points on her first serve, and saving all four break points presented to Garcia.

Kostyuk converted the single break chance afforded her, and won the set 6-3.

The final set saw both players hold serve for the first eleven games and Kostyuk matched Garcia with great shot making.

Garcia finally broke through with the first break point of the set and won a quarter final berth 6-1 3-6 7-5.  She will play Elina Svitolina.

Other results:

Wildcard CoCo Vandeweghe defeated wildcard Laura Siegemund 6-4 4-6 6-3

She will play Simona Halep in the quarter finals 

Karolina Pliskova (5) defeated qualifier Veronika Kudermetova 7-6(4) 6-3

She will play Jelena Ostapenko in the quarter finals 

Jelena Ostapenko (4) defeated qualifier Zarina Diyas 6-3 6-0

Barcelona 

Rafa Nadal (1) defeated Guillermo Garcia-Lopez 6-1 6-3

He will play Martin Klizan in the quarter finals 

Qualifier Martin Klizan defeated Feliciano Lopez (12) 6-1 6-4

David Goffin (4) defeated Karen Khachanov (16) 2-6 7-6(2) 6-0

He will play Roberto Bautista Agut in the quarter finals 

Roberto Bautista Agut (8) defeated lucky loser in qualifying Pablo Andujar 6-4 6-1

Stefanos Tsitsipas defeated Albert Ramos-Vinolas (10) 6-4 7-5

He will play Dominic Thiem in the quarter finals 

Dominic Thiem (3) defeated lucky loser in qualifying Jozef Kovalik 7-6(5) 6-2

Pablo Carreno Busta (5) defeated Adrian Mannarino (11) 6-2 4-6 7-6(6)

He will play Grigor Dimitrov in the quarter finals 

Grigor Dimitrov (2) defeated Malek Jaziri 7-5 3-6 7-6(8)

Istanbul 

Caroline Wozniacki (1) defeated Sara Errani 5-7 6-3 6-3

She will play Pauline Parmentier in the quarter finals 

Donna Vekic defeated Ajla Tomljanovic 6-1 6-2

She will play Irina-Camelia Begu in the quarter finals 

Maria Sakkari defeated Aleksandra Krunic 6-3 6-1

She will play Arantxa Rus in the quarter finals 

Qualifier Arantxa Rus defeated qualifier Danka Kovinic 2-6 6-2 6-0

Polona Hercog defeated Kateryna Bondarenko 6-2 1-1 (retired)

She will play Sveta Kuznetsova (2) in the quarter finals 

Budapest 

The top four seeds, and number six are out of the tournament before the quarter finals

John Millman defeated Lucas Pouille (1) 6-3 6-4

He will play Yannick Madden in the quarter finals 

Lucky loser in qualifying Yannick Madden defeated Maximilian Marterer 6-1 6-3

Andreas Seppi (8) defeated Mikhail Youzhny 6-1 6-2

He will play Nikoloz Basilashvili in the quarter finals 

Nikoloz Basilashvili defeated Denis Shapovalov (4) 6-2 6-4