De Grasse and Bolt enjoyed a moment of fun as they crossed the line
Usain Bolt ran his fastest time of the season to win his Olympic 200m semi-final in 19.78 seconds as Justin Gatlin missed out on a place in the final.
Jamaica's Bolt has already won the 100m and is now aiming for an eighth Olympic gold by retaining his 200m title.
Tontowi Ahmad (left) and Liliyana Natsir - Natsir won a mixed-doubles silver at Beijing 2008
Liliyana Natsir and Tontowi Ahmad of Indonesia beat Malaysia's Goh Liu Ying and Chan Peng Soon to claim gold in badminton's mixed doubles.
The Indonesians were always comfortably ahead, winning 21-4 21-12.
The 21-year-old fell to the ground in celebration after beating China's Wang Yihan
A 21-year-old badminton player has become India's latest hope for an Olympic medal at the Rio 2016 games, after a shock win against the world number two.
PV Sindhu upset China's Wang Yihan in the women's singles quarter final on Tuesday.
Ouseph loses in badminton quarter-final
Britain's Rajiv Ouseph is out of the men's singles at the Rio Olympics after losing his quarter-final to Viktor Axelsen of Denmark.
The 29-year-old lost 21-12 21-16 to the number four seed and European champion.
Brazil's hopes of a first Olympic women's football gold came to an end at the semi-final stage with a 4-3 penalty shootout defeat by Sweden.
The Swedes will play Germany, who beat Canada 2-0, at the Maracana on Friday.
