Top 9 German tennis players of all time

#4 Alexander Zverev

Alexander Zverev at the Nitto ATP Finals - Day Eight

The man widely tipped to break the grip of the 'Big 4' of tennis in Grand Slams is Alexander 'Sascha' Zverev.

Aged just 21, Zverev already has three ATP Masters 1000 and one ATP Finals trophies under his belt. With prize-money earnings of just under 15 million USD, Zverer is already inside the Top 35 highest grossing earners of all time.

Zverev achieved a career-high ranking of World Number 3 in November 2017 and is presently ranked Number 4 in the ATP charts - making him the youngest player in the ATP Top 20 rankings.

The Grand Slams have proven to be tricky for Zverev, with his best performance - a quarterfinal finish - coming at the 2018 French Open. That is, however, almost certainly going to change with Zverev showing a statement of intent at the Nitto ATP Finals of 2018.

He notched up back-to-back victories over Roger Federer and Novak Djokovic in the knockout stages of the tournament with thunderous performances. That made him only the fourth player in history to have beaten the two all-time greats in consecutive matches of such a prestigious tournament.