Serena Williams digs deep to beat Watson

Updated 2236 GMT (0636 HKT) July 3, 2015
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Heather Watson gave world No. 1 Serena Williams all she could handle at Wimbledon on Friday. She led 3-0 in the third set. Shaun Botterill/Getty Images
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. Shaun Botterill/Getty Images
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. Clive Brunskill/Getty Images
Williams clinched victory with a fierce backhand that caught the line on Center Court. Watson challenged but was proved incorrect. Clive Brunskill/Getty Images
But Watson competed well in front of her home crowd. The fans -- and Williams -- applauded her as she left tennis' most famous court. Clive Brunskill/Getty Images
Up next for Williams is older sister Venus, who had no such troubles Friday. She crushed Aleksandra Krunic. Julian Finney/Getty Images
Serena leads Venus 14-11 in their head-to-heads but Venus won their last encounter one year ago in Montreal. Streeter Lecka/Getty Images
Their last meeting at a grand slam came at Wimbledon in 2009, when Serena beat Venus in straight sets in the final. CARL DE SOUZA/AFP/Getty Images