Briton Cameron Norrie has said he will have to be "proactive" and "aggressive" when he takes on Andrey Rublev for a place in the US Open quarter-finals.
Seventh seed Norrie has already gone further than he ever has before at Flushing Meadows.
Should he get past ninth-seeded Russian Rublev, Norrie will play either Rafael Nadal or Frances Tiafoe on Wednesday.
Four-time winner Nadal faces American 22nd seed Tiafoe in the last 16 on Arthur Ashe Stadium at about 19:00.
"I think I'm going to have to be very proactive and be the one dictating the point as much as I can," Norrie said.