Malaysia's Commonwealth champion and former world number one Lee Chong Wei is being treated for nose cancer.
Five-time Olympic champion cyclist Sir Bradley Wiggins abandons plans to compete at the 2020 Olympics as a rower.
A decision to lift the suspension of Russia's anti-doping agency (Rusada) is labelled "the greatest treachery" of clean athletes.
The decision to reinstate Russia could have far-reaching consequences for global sport, argues BBC sports editor Dan Roan.
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Kenya's Eliud Kipchoge smashes the marathon world record, clocking a time of two hours one minute 39 seconds in Berlin.
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Analysis from the BBC sports editor, plus comment from other correspondents
Unsung Hero award back for 2018!
The BBC Get Inspired Unsung Hero award returns for 2018 to celebrate the most fresh, dynamic and dedicated volunteers driving participation in grassroots sports and fitness activities.