Fox San Antonio - Sports Last Update on July 03, 2015 15:01 GMT WIMBLEDON LONDON (AP) -- French Open champion and Wimbledon fourth seed Stan Wawrinka (vah-VRINK'-ah) has advanced to the fourth round at the All-England Club with a 6-4, 6-3, 6-4 win over Fernando Verdasco of Spain. The match took less than two hours to complete. The women's fourth-seed, Maria Sharapova (shah-rah-POH'-vah), has a match as well today. The two top-seeds are also scheduled to play. Serena Williams is facing Britain's Heather Watson while Novak Djokovic (NOH'-vak JOH'-kuh-vich) is playing Bernard Tomic (TOH'-mihch). Among the Americans in action today are men's No. 17 John Isner (IHZ'-nur) and women's 16th-seed Venus Williams. The day began with a minute of silence for the people murdered by an Islamic terrorist last Friday in Tunisia. Thirty of the 38 victims were British tourists. Queen Elizabeth II and British Prime Minister David Cameron also observed a minute of silence at noon local time.