Medvedev vs. Koepfer, Arnaldi vs. Machac
Half of the eight remaining players in the bottom half of the Miami draw are unseeded. That includes Dominik Koepfer, who runs into Daniil Medvedev on Tuesday. Matteo Arnaldi and Tomas Machac are also in fourth-round action.Dominik Koepfer vs. (3) Daniil MedvedevMedvedev probably figured to see Ugo Humbert on the other side of the net…
