US Open at a glance - Day four: Headlines + Osaka to meet Coco in third round + Nadal advances by walkover + Halep loses to US qualifier Townsend + Czech sixth seed Kvitova ousted + Kyrgios advances with ease Top results Rafael Nadal (ESP x2) bt Thanasi Kokkinakis (AUS) walkover Naomi Osaka (JPN x1) bt Magda Linette (POL) 6-2, 6-4 Coco Gauff (USA) bt Timea Babos (HUN) 6-2, 4-6, 6-4 Taylor Townsend (USA) bt Simona Halep (ROU x4) 2-6, 6-3, 7-6 (7/4) Andrea Petkovic (GER) bt Petra Kvitova (CZE x6) 6-4, 6-4 Sidelines Kobe's Legacy on display at US Open -- Former Los Angeles Lakers star Kobe Bryant, a five-time NBA champion and twice an Olympic gold medalist, unveiled a tennis-related book at the...