Meanwhile, Moscow says its troops have inflicted a series of defeats on Ukrainian units in Kursk. Submit your questions for our correspondents in the box below.

Why do we have the Olympics? Why is physical activity important? Find out more about how to stay healthy More from BBC Teach More than 10,000 athletes representing over 200 countries competed for ...

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In doubles matches, players take turns to hit the ball. Table tennis first appeared at the Seoul Olympic Games in 1988, with singles and doubles competitions for men and women. In 2008, the doubles ...