You must create a free account to watch 2020 Nitto ATP Finals. Daniil Medvedev vs Dominic Thiem, Nitto ATP Finals 2020 Details: Where and when to watch, time and more. Sunday’s championship match at the Nitto ATP Finals is a massive deal and it will also reveal who among Dominic Thiem and Daniil Medvedev is most likely to threaten Novak Djokovic’s hold on No. 1 in the future. Thiem leads his ATP Head-to-Head series against Medvedev 3-1.