Will There Ever Be Another Great Tennis Rivalry?

Nadal vs Federer. Williams vs Williams. Sure these are some very great tennis rivalries but there getting...well boring. Back in the day there were always great rivalries like Billie Jean King vs Margaret Court, Graf vs Seles, Navratilova vs Evert, Borg/Mcenroe, Borg/Connors etc! There are so few rivalries now and days it just sickens me. Where are the rivalries at anymore. I was counting on Ivanovic/Sharapova, Djokovic/Rod, Blake/Gonzalez, Kuzy/Sharapova, and even Safina/Dementieva gut it isn't happening. When and with whom will this occur?