Eugenie Bouchard’s revitalising run at the US Open is over after she slipped and fell in the locker room. The Canadian star could now be a doubt for the Hong Kong Tennis Open next month. She controversially withdrew from last year’s inaugural event . Bouchard was diagnosed with a concussion after falling in the locker room at Flushing Meadow. She was hurt Friday and pulled out of two doubles matches Saturday, hoping to still play in singles. But tournament officials announced Sunday that she had withdrawn. The 21-year-old Bouchard, a runner-up at Wimbledon last year, had been struggling coming into the US Open but rediscovered her form at Flushing Meadows – with a boost from some work with Jimmy Connors. Her ranking, No.5 last autumn, had slipped to 25th, and she’d lost 14 of 17 matches before arriving in New York. But then she suddenly strung together her first three-match winning streak since January, capped by a grueling three-set victory Friday over 2014 Australian Open runner-up Dominika Cibulkova. Bouchard was seen arriving at the tennis center Sunday with a hoodie pulled over her head, wearing dark sunglasses and walking gingerly. With a month to recover before the October 10-18 Hong Kong Open, local tennis fans will hope the poster girl of women’s tennis is fully fit.