Results on Monday in the ATP and WTA tournament in Acapulco (x-denotes seeded player): Men 1st rd Miomir Kecmanovic (SRB) bt Alex De Minaur (AUS) 3-6, 6-4, 6-3 Stan Wawrinka (SUI x3) bt Frances Tiafoe (USA) 6-3, 6-7 (4/7), 7-6 (7/1) Adrian Mannarino (FRA) bt Cameron Norrie (GBR) 2-6, 6-3, 6-3 Marcos Giron (USA) bt Gerardo Lopez (MEX) 6-4, 7-6 (7/3) Tommy Paul (USA) bt Mackenzie McDonald (USA) 6-7 (4/7), 6-4, 6-4 Women 1st rd Tamara Zidansek (SLO) bt Anna Kalinskaya (RUS) 6-3, 6-4 Tatjana Maria (GER) bt Marie Bouzkova (CZE x3) 6-4, 1-6, 6-2 Anastasia Potapova (RUS) bt Anna Karolina Schmiedlova (SVK) 4-6, 7-5, 6-1 Nao Hibino (JPN x8) bt Arantxa Rus (NED) 6-3, 6-1 Heather Watson (GBR x7) bt CoCo Vandeweghe (USA) 4-6, 6-4, 6-4 Kateryna Bondarenko (UKR) bt Danka Kovinic (MNE) 6-7 (7/9), 6-4, 6-2 Wang Xiyu (CHN) bt Wang Yafan (CHN x2) 6-4, 7-6 (10/8) afp