The Big 3—Novak Djokovic, Rafael Nadal and Roger Federer—have combined to claim the last 12 Grand Slam titles between them.

Stefanos Tsitsipas envisions a major change coming to the game.

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The 21-year-old Greek believes NextGen stars will break through and win Grand Slams in the next two years.

"The Grand Slams at some point we'll see change," Tsitsipas told the media in Shanghai. "It can't be that Roger, Rafa and Novak win everything.

"I know that in order to see my name among these [major] titles I'm gonna have to go through a lot of pain and hype and struggle. I'm honestly excited. I'm excited about the idea of trying to get there." 

At last month's US Open 23-year-old Daniil Medvedev reached the final becoming the youngest Flushing Meadows finalist since Djokovic in 2010.

Federer, who fell to Tsitsipas at the Australian Open in January, says it will be tough to stop one of the NextGen stars from mastering a major. 

"I think it really creates good intentions to actually wanting to improve faster, and I see that right now," Federer said. "We didn't think that Tsitsipas was going to come up as quick as he did. He had an unbelievable year from a year and a half ago.

"And to Medvedev now, his run is crazy. Khachanov winning Paris, that was unexpected. Each one of them has really shown some really good matches and some great runs. Same with Shapo and Felix and Rublev, also. Obviously Sascha was there before. Nick, we know, too."

The 20-tme Grand Slam king says the swarm of rising young stars creates rapid improvement. 

"I think really it's a lot of guys, which helps for them to really make a move now," Federer said. "Yeah, they've got our attention, no doubt about that. I think it's going to be a very exciting year-end now also with a few guys going to be at the World Tour Finals, and then next year it's going to be hard to keep on winning all those slams between the best guys right now as we know, so it's going to be interesting."

Photo credit: Christopher Levy