Serena Williams already the best of all time, tennis greats agree
Grand slam awaits, but win or lose, US star has nothing to prove

Serena Williams is on the brink of a crowning achievement in tennis, but as far as several top analysts are concerned, the 33-year-old American has already established herself as the greatest women’s player ever.
Williams would become only the fourth woman to sweep all four grand slams in a season should she win a fourth consecutive US Open title in the tournament starting on Monday.
"To me, she’s the greatest female player that every played," seven-times slam winner John McEnroe said about the holder of each of the slam titles following 2015 wins at the Australian, French and Wimbledon championships and her 2014 US victory.
Former doubles specialist Pam Shriver said Williams’ performance this year moved her to rank the American ahead of 18-times grand slam champion Martina Navratilova.
"This year I’ve put her as my all-time great," Shriver said. "She’s still winning so many majors, so many more than anyone else in their 30s. She’s won them in the ’90s, 2000s and now – three different decades."