Tennis round-up: Kristyna stuns twin Karolina

IMAGE: Czech Republic's Pliskova twins, Kristyna and Karolina Pliskova embrace at the net after their second round match at the WTA Premier Nature Valley Classic at Edgbaston Priory Club,......

The secret behind Serena's superhero catsuit at French Open

'I always wanted to be a superhero, and it's kind of my way of being a superhero. I feel like a superhero when I wear it.' IMAGE: Serena Williams celebrates a point during her first round match......

French Open: Serena returns to Grand Slam action on Day 3

IMAGE: Serena Williams hits a forehand during a practice session ahead of the French Open. Photograph: Cameron Spencer/Getty Images Former world number one Serena Williams returns to Grand Slam......

PIX: Ostapenko stuns Pliskova; Easy for Djokovic, Tsitsipas

Images from Day 5 of the French Open, at Roland Garros, in Paris. IMAGE: Latvia's Jelena Ostapenko hit 27 winners during her second round match against the Czech Republic's Karolina Pliskova.......

Birthday girl Kerber gifts unnecessary points before winning

IMAGE: World No 1 Germany's Angelique Kerber poses with a birthday cake which was presented to her by Australian Open Tournament Director Craig Tiley during day three of the 2017 Australian Open......