Collated results from day two of the WTA Auckland Classic tennis tournament on Tuesday: 1st rd Petra Martic (CRO x2) bt Usue Maitane Arconada (USA) 5-7, 6-4, 6-4 Alize Cornet (FRA) bt Ysaline Bonaventure (BEL) 4-6, 7-5, 6-3 Amanda Anisimova (USA x3) bt Kateryna Kozlova (UKR) 6-3, 6-4 Serena Williams (USA x1) bt Camila Giorgi (ITA) 6-3, 6-2 Caroline Wozniacki (DEN x5) bt Paige Hourigan (NZL) 6-1, 6-0 Julia Goerges (GER x4) bt Greet Minnen (BEL) 6-1, 7-6 (7/4) Laura Siegemund (USA) bt Catherine McNally (USA) 6-2, 6-2 Lauren Davis (USA) bt Varvara Lepchenko (USA) 7-6 (9/7), 6-2 Christina McHale (USA) bt Ann Li (USA) 7-5, 6-2 cf/th