Billie Jean-King: French Open final defeat may be beginning of the end for Serena Williams
King, who won 12 grand slams in the 1960s and 1970s, said: "It is the changing of the guard. Garbine has such power. Her backhand is phenomenal. She can hit as well cross court as down the line which makes her extremely dangerous. And 22 is the perfect age to win your first Grand Slam.
"Martina Navratilova won her first Wimbledon at 22, I won my first Wimbledon at 22. We had time to improve tennis-wise and physically.
"Playing the Wimbledon final last year helped her win here. One thing is certain, her victory will give ideas to other players of her generation. That is how it works, that is how it has always worked."
The Spanish Federation Cup captain Conchita Martinez went further to back Muguruza to usurp her from her position as the last woman from her country to win Wimbledon.
The 1994 champion said: "She was in the Wimbledon final last year and now she has more experience. She can play on any surface and she has a very good chance at Wimbledon - I think she can beat anybody.
"Her game works on grass because she is very aggressive, she hits the ball hard and goes for her shots. She can serve very well, her mentality is much better than a year ago."
Credit for much of this has to go to her coach, Sam Sumyk, who took Victoria Azarenka to world No1 before teaming up with Muguruza in September.
http://www.express.co.uk/sport/tennis/677013/French-Open-Serena-Williams-Billie-Jean-King-Garbine-Muguruza-Roland-Garros-Tennis-NewsBillie Jean-King: French Open final defeat may be beginning of the end for Serena WilliamsKing, who won 12 grand slams