Delray Beach, United States: Results on Friday from the ATP Delray Beach Open (x denotes seed): Quarter-finals Tommy Paul (USA x4) bt Stefan Kozlov (USA) 6-3, 6-1 Cameron Norrie (GBR x1) bt Sebastian Korda (USA x5) 6-2, 1-6, 7-6 (7/4) Reilly Opelka (USA x2) bt Adrian Mannarino (FRA x7) 7-6 (7/2), 3-6, 6-1 John Millman (AUS) bt Grigor Dimitrov (BUL x3) 6-4, 6-4