Wimbledon day 7th : Highlights : Serena Williams : Alison Riske : Nadal 
Two of the top three women's seeds fell on a dramatic fourth round Monday at Wimbledon - but it was much more straightforward for the men's 'big three' who swept away their opponents without dropping a set.

World number one and French Open champion Ashleigh Barty was beaten in three sets by American Alison Riske, while third seed Karolina Pliskova fell to her Czech compatriot Karolina Muchova in a three-set marathon, the world number 68 coming through 13-11 in the decider.

But there were wins for seven-times champion Serena Williams and British hope Johanna Konta, who beat former champion Petra Kvitova.

In the men's singles, defending champion Novak Djokovic was too good for French youngster Ugo Humbert, Rafael Nadal eased past Portugal's Joao Sousa while Roger Federer demolished Italy's Matteo Berrettini for the loss of just five games.