Sardinia ATP results on Friday (x denotes seeded player): Quarter-finals Danilo Petrovic (SRB) bt Federico Delbonis (ARG) 7-6 (7/3), 6-1 Marco Cecchinato (ITA) bt Albert Ramos-Vinolas (ESP x4) 4-6, 6-1, 6-1 Lorenzo Musetti (ITA) bt Yannick Hanfmann (GER) 6-2, 6-4 Laslo Djere (SRB) bt Jiri Vesely (CZE) 6-4, 6-4 afp