Great Britain's Heather Watson and Laura Robson have both lost first round matches in the US ahead of next week's US Open.
World number 70 Watson was beaten 6-3 6-4 by Belgium's Yanina Wickmayer at the Texas Open.
Meanwhile, 18-year-old Robson suffered a 6-3 6-3 defeat to Italian Marion Bartoli at the New Haven Open.
Both Watson and Robson will now play in the US Open, which starts on August 27.
