
Every year, young tennis fans stalk the grounds of Wimbledon in the hope they can catch a glimpse of their favourite stars.
So you can understand the excitement of these two boys when Li-Na walked right into their path.
And you can understand their embarrassment after realising they had confused the world No2 with Taiwanese star Su-Wei Hsieh.
But at least Hsieh saw the funny side of it:
https://www.youtube.com/watch?v=vS0tX82bgAI
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