Delray Beach, United states: Results on Tuesday from the ATP Delray Beach event (x denotes seed): 1st rd Sebastian Korda (USA x5) bt Thanasi Kokkinakis (AUS) 6-4, 6-1 Denis Istomin (UZB) bt Sam Querrey (USA) 6-1, 7-6 (7/5) Stefan Kozlov (USA) bt Emilio Gómez (ECU) 4-6, 7-5, 6-3 Marcos Giron (USA) bt Tennys Sandgren (USA) 7-5, 6-3 Mitchell Krueger (USA) bt Jordan Thompson (AUS) 6-2, 6-4 Adrian Mannarino (FRA x7) bt Liam Broady (GBR) 6-2, 6-3 Jack Sock (USA) bt Daniel Altmaier (GER) 2-6, 6-3, 6-4