Young gun Stefanos Tsitsipas has ended Novak Djokovic’s reign as Shanghai Masters champion after qualifying for the ATP Finals.

The 21-year-old Greek player capped a memorable Friday by beating Djokovic with a score of 3-6, 7-5, 6-3.

His spot was sealed in the season-ending tournament in London after Daniil Medvedev’s victory over Fabio Fognini with the result of 6-3, 7-6 (7-4).

READ MORE: Who is Stefanos Tsitsipas? And why are Greeks making so much noise about him?

The sixth seed defeated the world number one at the Rogers Cup last year and gained revenge for a defeat in their second meeting in Madrid this year. In 2019, Tsitsipas has also managed to beat Roger Federer and Rafael Nadal.

It is the first time that all four Shanghai semi-finalists are under the age of 24. This has not been the case since a Masters Event 20 years ago in Hamburg.