Over on the women's side -- Serena Williams was in a battle with Svetlana Kuznetsova for a berth in the quarter-finals. The American also got into an argument with the umpire over the playing conditions after rains started to affect play. The official did not postpone the match, right away and that prompted the defending champ to threaten a lawsuit if she got injured during the match.

Play would be delayed for about a half hour when the closed the roof on centre court. Serena took the opener 7-5, but was in a groove in the next frame -- and shows off some nice touch at the net with the drop half volley -- and leads 3-love.

The top seed would not drop a game in the second and seals victory when the Russian fires her return long on match point. Seeking a seventh Wimbledon title and 22nd Grand Slam trophy overall, Williams next faces 21st seed Anastasia Pavlyuchenkova for a place in the last four.

36-year-old is oldest Quarter-finalist since 1994

Older sister Venus would join Serena in the last 8, the former five-time champ was able to dispose of Carla Suarez-Navarro in straight sets 7-6, 6-4 is the final. The 36-year-old is now the oldest player to make the quarter-finals since a 37-year-old Martina Navritalova did it in 1994. She now faces Yaroslava Shvedova next.

13th seed may postpone wedding Saturday if winning run continues

And Slovakia's Dominika Cibulkova at the top of your screen was able to edge past third seed Agnieszka Radwanska in three sets. 9-7 in the decider. The Slovakian is scheduled to get married Saturday, but may have to postpone that if she continues winning.

In other action, Simona Halep came from a set down to beat Madison Keys. Germany's Angelique Kerber beat Misaki Doi in straight sets. And 21st seed Anastasia Pavlyuchenkova is through to her first Grand Slam quarter-final in five years after defeating Coco Vandeweghe.