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Tennis star Yibing Wu collapsed at the Mubadala Citi DC Open in the US capital Monday afternoon.
The shocking scenes come just weeks after the Chinese player suffered a similar incident during his Wimbledon opener against Frances Tiafoe earlier this month.
Wu, 23, was beating Yosuke Watanuk 4-1 in the round of 64 at the tournament in Washington DC Monday but was forced to retire from the match.
Staff rushed to hold him up before gently lowering him to the ground, before helping him off the court to have him checked out.
During his collapse at SW19 earlier this month, Wu also appeared to have been suffering from breathing problems.