Agassi: "I would never bet against Djokovic".

Former world No.1 Andre Agassi spoke to Tennis365 about Novak Djokovic.

The American spoke in particular about his future: "It's hard to say, time always wins. He's already achieved a lot over a long period, and it's hard to imagine any more.

I think he's going to run out of energy. It's particularly difficult when the people you've come to the circuit with are ending their careers.

Sampras' departure was a blow to me and set me back a bit. I had to find my inspiration again.

And Djokovic lost the guys he was making history with. So he'll probably get tougher and tougher emotionally, but I'd never bet against him. Bet against him at your own peril."