NOTTINGHAM, UK - World No.17 Magdalena Rybarikova joins Ashleigh Barty, Naomi Osaka and British No.1 Johanna Konta for the Nature Valley Open in Nottingham next month.

Last year's winner Donna Vekic, Olympic gold medalist Monica Puig and British No.2 Heather Watson are also confirmed for the tournament that runs from June 9 to 17 at the Nottingham Tennis Centre.

Slovakian Rybarikova reached the semifinals in Nottingham last year and was also a semifinalist at Wimbledon, where she lost to eventual champion Garbiñe Muguruza.

"I am excited to return to Nottingham next month and am looking forward to playing in the Nature Valley Open again," said Rybarikova.

"I enjoyed my time in the city and at the tournament last year. The grass courts are excellent, so it is the perfect way for me to start my preparation for Wimbledon.

"I had a great run to the semifinal last time and I hope I can improve on that this year."  

WTA Tournament Director Rebecca James said: "This is a top-class line-up and one I am sure the public are excited about seeing.

"It is fantastic to have four of the world's top 25 in Nottingham and it shows how important this tournament is for the grass-court season."