Alexander Zverev spoke about younger guys possibly making an ultimate breakthrough in 2020. The German player, speaking next to Roger Federer in Bogota, Colombia, on Thursday, said: "When you are on the court you do your best to win, to be a better player at the end of the day.
But you can't predict things like, This year I am going to do that, this year I will win a Grand Slam. You work hard to do everything that you can to put yourself in the best position, then you go out on court and you try your best.
It's not like that is the next year that we know a younger player will win a Grand Slam. Is it possible? Yes, because I think the younger players are playing very good tennis. In the past years me and Dominic Thiem were playing well and Roger, Rafa and Novak were better than us although I won Masters 1000s and ATP Finals.
Now more younger guys are playing well like Tsitsipas who just won the World Tour Finals, Medvedev who made a Grand Slam final, he was the first young guy to do that as well, Berrettini who made it to London, so there is a big group of young guys."
The Russian coach Viktor Yanchuk spoke about the upcoming Davis Cup Russia-Serbia tie: "Serbia is a country we know. You can face Djokovic, our guys are confident. The mental edge will be on our side, guys have nothing to lose, they can just earn.
Daniil Medvedev could have mentally helped our team but he is not ready to play at a high level. The new Davis Cup format is not perfect. Canadians refused to play doubles and it really raises doubts on the fairness of this system."