Wins for Alexandr Dolgopolov, Pablo Carreno Busta and Albert Ramos-Vinolas in Rio

Alexandr Dolgopolov remains on course at the Rio Open

Alexandr Dolgopolov will meet Pablo Carreno Busta in the last eight of the Rio Open while Juan Martin del Potro makes progress at Delray Beach.

Ukraine's Dolgopolov overcame Horacio Zeballos 7-6 (7-4) 4-6 6-4 while Spanish fourth seed Carreno Busta beat the Domincan Republic's Victor Estrella Burgos 6-2 4-6 6-2.

Diego Schwartzman ousted fellow Argentinian Federico Delbonis 6-4 7-6 (7-1).

Fifth seed Albert Ramos-Vinolas advanced with a 6-2 6-3 victory over Italian Fabio Fognini and the Spaniard will play Argentinian qualifier Nicolas Kicker, who defeated Arthur De Greef 6-3 6-3.

There were also wins for Casper Rudd and Thiago Monteiro.

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Del Potro made it through to the quarter-finals of the Delray Beach Open as he continued his comeback from injury.

The Argentinian beat Damir Dzumhur 7-5 (7-6) 4-6 6-3 and will play American Sam Querrey, who dispatched compatriot Jared Donaldson 6-2 6-3.

Donald Young won another all-American contest against Taylor Fritz 4-6 6-3 6-4 while Belgian Steve Darcis completes the last-eight line-up after beating Nikoloz Basilashvili.

Gael Monfils kept the home fans happy in Marseille

Top seed Gael Monfils set up a quarter-final clash with fellow Frenchman Richard Gasquet at the 13 Open in Marseille.

Monfils beat Ukrainian qualifier Sergiy Stakhovsky 6-1 6-4, while sixth seed Gasquet ousted Russia's Mikhail Youzhny on Wednesday.

Second seed Jo-Wilfried Tsonga set up another all-French last-eight clash against Gilles Simon with a 6-3 6-3 win against Ukraine's Illya Marchenko.

Slovakian qualifier Norbert Gombos will play third seed Nick Kyrgios following his 7-5 3-6 7-6 (7-5) victory over Nicolas Mahut.

Unseeded Russian Daniil Medvedev meets fourth seed Lucas Pouille in the last eight after edging out Germany's Jan-Lennard Struff 6-3 3-6 7-6 (7-3).

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