Coach says 'anger' keys Lee's motivation

Badminton world No 1 Lee Chong Wei still has the "anger" to prove himself a good player and an Olympic champion after a doping scandal that stained his record and set back his career, according to his coach Hendrawan.

The 33-year-old Malaysian is bidding for an elusive gold medal in his Olympic swan song in Rio after heartbreaking losses to Chinese great Lin Dan in the championship matches at the Beijing and London Games.

Lee will face Lin in the semi-finals, hoping desperately to topple his long-time nemesis and go on to end his nation's 52-year wait for a first Olympic title.