Fourth-seeded Daniil Medvedev needed a medical timeout for a nose bleed before beating Spanish qualifier Pedro Martinez 7-5, 6-1, 6-3 and advancing to the third round.
The U.S. Open finalist called for a medical timeout while leading 5-0 in the second set and needed treatment to stop the bleeding.
Medvedev fended off four breakpoint chances to hold in the sixth game of the third set, and finished off strongly.
