The two greats last met in the 2019 Nitto ATP Finals in a Round Robin clash which Federer won 6-4, 6-3, his only win over the Serbian since 2016. Novak Djokovic had a fairly comfortable ride in this year’s tournament as he was taken to the fourth set just once so far. Roger Federer was taken to the limit first by John Millman and then by Tennys Sandgren