RIO DE JANEIRO — It looks like Usain Bolt has a new rival. Or perhaps a new sidekick.
Bolt, who lit up Rio with his third straight Olympic gold in the 100 meters this week, was coasting to a semifinal victory in the 200 Wednesday when he felt someone on his right side challenging him. A quick glance showed him to be Andre De Grasse, the young Canadian who took bronze in the 100, and he was threatening to pass him.
Bolt, the 29-year-old two-time defending champion in the 200, flashed a huge smile, turned on the jets, and edged De Grasse at the finish line.