Davidovich Fokina caused frustration for the Veenendaler by hitting an underhand service a number of times, including once on a break point. The 24-year-old Spaniard had success with it several times. On Thursday, Van de Zandschulp had been on the track for more than 4 hours against the Chinese Zhizhen Zhang. The Dutchman won that game in five sets, after a 6-2 4-1 deficit.