Serena Williams digs deep to beat WatsonUpdated 2236 GMT (0636 HKT) July 3, 2015 Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds. Photos: Heather Watson gave world No. 1 Serena Williams all she could handle at Wimbledon on Friday. She led 3-0 in the third set. Hide Caption 1 of 8 Photos: It was looking like that kind of day for Williams, who had also struggled in patches at the French Open. Watson had a chance to serve out the third round match. Hide Caption 2 of 8 Photos: But Williams is hard to put away, and she proved it once again, winning the third set 7-5. The "Serena Slam" and the calendar-year slam are thus still possibilities. Hide Caption 3 of 8 Photos: Williams clinched victory with a fierce backhand that caught the line on Center Court. Watson challenged but was proved incorrect. Hide Caption 4 of 8 Photos: But Watson competed well in front of her home crowd. The fans -- and Williams -- applauded her as she left tennis' most famous court. Hide Caption 5 of 8 Photos: Up next for Williams is older sister Venus, who had no such troubles Friday. She crushed Aleksandra Krunic. Hide Caption 6 of 8 Photos: Serena leads Venus 14-11 in their head-to-heads but Venus won their last encounter one year ago in Montreal. Hide Caption 7 of 8 Photos: Their last meeting at a grand slam came at Wimbledon in 2009, when Serena beat Venus in straight sets in the final. Hide Caption 8 of 8Serena Williams came back from 3-0 down in the third set to beat Heather Watson at Wimbledon. More from Sport - TennisSerena Williams ties the knot at 'Beauty and the Beast' themed weddingRafael Nadal wins defamation case over doping claimsCaroline Wozniacki beats Venus Williams for first time to win WTA FinalsUnited States beat Belarus to win first Fed Cup title since 2000U.S. tennis star Jack Sock takes CNN's 'Sock Challenge'!!