(Reuters) - Serena Williams has a great chance to sweep to victory at Wimbledon and hold all four grand slam titles at the same time but she must raise her consistency, former champions Chris Evert and John McEnroe said on Thursday.
Williams is one Wimbledon title away from completing what she calls the Serena Slam for the second time in her career -- having followed up her 2014 U.S. Open success with victories at this year's Australian and French Opens -- but must overcome her recent lean spell on grass.
After winning the last of her five Wimbledon titles in 2012, the American world number one has fallen before the quarter-finals in her last two outings at the grasscourt major.