Serena humiliated by Konta in San José

More first round results in the five tournaments contested on the ATP and WTA tours.

Washington:

WTA

Naomi Osaka (3) defeated Bernarda Pera 6-2 7-6(4)

Donna Vekic (7) defeated Caroline Dolehide 6-3 6-4

Ana Bogdan defeated Ekaterina Makarova (4) 7-6(2) 6-3

Nao Hibino defeated qualifier Sofya Zhuk 7-5 6-4

Belinda Bencic defeated qualifier Harriet Dart 7-5 6-2

Sloane Stephens (2) defeated wildcard Bethanie Mattek-Sands 7-5 6-4

Yulia Putintseva (8) defeated Tatjana Maria 6-3 3-6 6-4

With rain delays, four first round matches are yet to be played 

ATP

James Duckworth defeated qualifier Thai-Son Kwiatkowski 6-3 7-5

Jared Donaldson defeated Jordan Thompson 6-4 7-6(4)

Wildcard Daniil Medvedev defeated qualifier Yosuke Watanuki 3-6 7-5 6-1

Qualifier Donald Young defeated wildcard Stan Wawrinka 6-4 6-7(5) 7-6(3)

Marcos Baghdatis defeated Benoit Paire 6-3 3-6 6-2

Alex de Minaur defeated Vasek Pospisil 6-7(6) 6-2 6-3

Denis Kudla defeated Lukas Lacko 6-7(3) 6-1 6-4

Pierre-Hugues Herbert defeated qualifier Mitchell Krueger 7-5 6-3

Qualifier Vincent Millot defeated Yuichi Sugita 6-3 6-2

With rain delays, one first round match still needs completion - wildcard Tommy Paul leads qualifier Alex Bolt 3-6 7-6(0) 4-1

San Jose:

Vera Lapko defeated Shuai Zhang (7) 7-6(2) 6-0

Tímea Babos (8) defeated Kiki Mladenovic 6-4 6-2

Mihaela Buzarnescu (5) defeated Sachia Vickery 6-3 4-6 6-3

Heather Watson defeated wildcard Claire Liu 6-4 3-6 6-4

Johanna Konta defeated Serena Williams (6) 6-1 6-0

16 year old US qualifier Amanda Anisimova defeated Qiang Wang 6-2 7-5.

Anisimova reached the fourth round of the Indian Wells Premier Mandatory tournament earlier this year, the youngest since 2005 to reach that point, knocking out Petra Kvitová in the process.  In the next tournament - Miami Premier Mandatory - Amanda defeated Qiang Wang in the opening round, but injured her foot in doing so, forcing a withdrawal and out of tennis for four months. This is just her second tournament in her return.

Los Cabos:

US qualifier Marcos Giron, ranked 446, defeated Marcelo Arevalo 6-2 7-5

Egor Gerasimov defeated Bernard Tomic 6-4 6-3

Sam Querrey (5) defeated wildcard Lucas Gomez 6-2 6-3

Peter Polansky defeated lucky loser Daniel Elahi Galan 6-4 3-6 6-2

Feliciano López (8) defeated qualifier Mohamed Safwat 7-6(3) 6-4

Cameron Norrie defeated qualifier Prajnesh Gunneswaran 6-2 6-2

Quentin Halys defeated Gilles Müller 6-4 6-4

Kitzbuhel:

Qualifier Martin Klizan defeated wildcard Sebastian Ofner 6-2 6-4

Last weeks Gstaad semi finalist Laslo Djere defeated Nikoloz Basilashvili, last weeks first time winner in Hamburg 6-3 6-3

How the mighty quickly fall.

Taro Daniel defeated Jan-Lennard Struff (7) 7-6(3) 6-1

Matteo Berrettini defeated Gilles Simon (5) 1-6 6-3 6-4

Radu Albot defeated Jozef Kovalik 6-1 6-3

Nicolas Jarry defeated Roberto Carballes Baena 7-6(3) 6-7(5) 6-4 in a marathon match lasting over two and and a half hours.

Maximilian Marterer (6) defeated Jürgen Zopp 6-4 3-6 6-3