Caroline Garcia's French Open run is over following a quarter-final defeat to Karolina Pliskova.
"I feel like I can play well on any surface," said Caroline Wozniacki after reaching the French Open quarter-finals.
Karolina Pliskova lost to Magdalena Rybarikova at Wimbledon last year and fell to the unseeded Slovakian again in Birmingham.
Johanna Konta refused to shake the chair umpire's hand and stormed off court after losing to Ashleigh Barty in the Nottingham Open final.
Roger Federer did not take long to reach the top of the rankings on his return to action, dethroning Rafael Nadal by beating Nick Kyrgios.
Rafael Nadal's charge towards an 11th French Open title continued with Monday's straight-sets victory over Maximilian Marterer.
Serena Williams has been forced to pull out of the French Open through injury.
World number one Simona Halep lost just three games in a clinical demolition of Elise Mertens to reach the last eight at a canter.
Serena Williams did what was required with a straight-sets victory over Kristyna Pliskova in the first round of the French Open.
With the French Open looming, Serena Williams put in the work at Roland Garros on Monday.
Venus Williams advances to the quarterfinals in the Italian Open after a three set battle with her British opponent.