What to watch Tuesday night at the World Athletics Championships

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Day 5 of the World Athletics Championships in Oregon is a quiet one. There's only one session of action (starting at 8:15 p.m. ET) and Canadians are involved in only one event. Here's what to watch tonight:

Aaron Brown and Jerome Blake in the men's 200m semifinals at 9:50 p.m. ET

Olympic champion Andre De Grasse's decision to pull out of his best event after struggling in the 100m left two Canadians in last night's heats. Both advanced to tonight's semis, though not without some drama.

After Jerome Blake qualified automatically by finishing third in the opening group, Aaron Brown had a tougher time in heat 2. Just after the gun went off, the Canadian 200m champion lost his footing and went down on the track, drawing gasps from the crowd at Hayward Field. The race was immediately halted because the stumble wasn't Brown's fault: his starting blocks weren't properly anchored, causing them to slip backward when he pushed off. After a restart, Brown shook off the strange mishap to finish second in the heat (behind Trinidad and Tobago's Jereem Richards) and secure a spot in the semis. Watch Brown's failed start and his cool-headed recovery to advance here:

WATCH | Brown books ticket to 200m semifinal:

Brown, who placed sixth in the 200 at the Tokyo Olympics and at the 2019 world championships, will try to advance to his third straight major final tonight. He's in the last of the three semifinal heats, which goes at 10:10 p.m. ET and features Erriyon Knighton. The 18-year-old American sensation ran a world-leading 19.49 in April to become the fourth-fastest 200m runner of all time,