Are the Wimbledon titles more up for grabs than ever?

WIMBLEDON, England -- With the notable exception of Rafael Nadal winning the French Open almost every year, Wimbledon used to be one of the most predictable tournaments in the calendar, a time when you could pick the likely title winners on the fingers of one hand.

Martina Navratilova and Chris Evert, Bjorn Borg and John McEnroe, Boris Becker and Stefan Edberg, Pete Sampras and Andre Agassi, Roger Federer, Rafael Nadal and Novak Djokovic and Serena and Venus Williams all dominated proceedings.