Hong Kong's Annie Au Wing-chi learnt a hard lesson on the international stage as she crashed out of the Cathay Pacific Gale Well Hong Kong Squash Open yesterday. The hosts' top-ranked player was beaten by Engy Kheirallah of Egypt 3-1 in the opening round of the HK$1.6 million tournament at Hong Kong Squash Centre. 'I played my worst match of the year,' said the world number 15. 'I was never near my best throughout the match, although I have to pay tribute to my opponent as she was very consistent throughout.' In another first-round match, Rebecca Chiu Wing-yin ousted qualifier Song Sun-mi of South Korea in straight games 11-0, 11-4, 11-4. Chiu, now ranked two places behind Au in the world standings, will take on world number one Nicol David of Malaysia. Au, who defeated the Egyptian 3-2 when they met in Cairo last year, admitted she needed to learn to play under pressure. 'I had a good start after taking the first game 11-4 but once she had settled in I lost a few points. I started struggling and committed too many mistakes, which made it difficult to come back,' she said. 'But still I have learnt something and it is a good experience.' Kheirallah, the world number 21, took the next three games in a row 11-5, 11-4, 11-6 to set up a second-round clash with Jenny Duncalf of England. Hong Kong coach Tony Choi Yuk-kwan said a match like this would help Au mature. 'When she first started, she had nothing to lose against other players as her opponents all had higher world rankings. Now she is in the top 20 and the highest ranked player from Hong Kong, she has put pressure on herself which she may not be aware of. But she will have learned something today,' Choi said.