Wait for that special player to respark your interest. Could take a while.
I must say, these Rafaless days I can still enjoy tennis, but not nearly half as much as to when he's around the tour (doesn't even have to be a Rafa match, as long as he's there)
Yeah, I'm the same when my faves go away. I never completely lose interest, but I need a special player to be really into it.
Sometimes, you're lucky. I did not feel too depressed after Kafelnikov's retirement, because I quickly started to follow Coria. But when Coria's career came to an end quite prematurely, it took me a long time and I did lose interest for a while.