Martin Landaluce vs Karen Khachanov — R32 — Miami Open

Martin Landaluce, ranked 151st, took down world No. 15 Karen Khachanov 6-3 7-6(2) by owning the second-serve exchanges — 59% of his second-serve points won to Khachanov's 36%, a 23-point gulf that decided everything else. The early break in game 3 carried the opener; the second set turned into a trade-off, four breaks split before Landaluce surged through the tiebreak 7-2. He also out-hit Khachanov 25 winners to 12. The Spaniard, who hadn't dropped a set en route, books a Sebastian Korda meeting next.