Canadians to watch tonight at the track and field world championships

This is an excerpt from The Buzzer, which is CBC Sports' daily email newsletter. Stay up to speed on what's happening in sports by subscribing here.

It's a long shot, but Canada has a chance to win its second medal of the World Athletics Championships in Oregon tonight. Meanwhile, two other Canadian contenders will try to advance to the finals of their events. Here's what to watch when Day 7 action at Hayward Field gets underway at 8 p.m. ET:

Aaron Brown in the men's 200m final (10:50 p.m. ET)

Olympic champion Andre De Grasse's decision to withdraw from this event after failing to qualify for the 100m final robbed Canada of one of its best medal chances of the meet. It would be stunning if Brown makes the podium, but hats off to him for reaching the 200m final for the third consecutive time at a major championship. The 30-year-old Canadian champion placed sixth at both the 2019 worlds and last summer's Olympics.

All eyes tonight will be on Americans Noah Lyles and Erriyon Knighton, budding rivals who ran the two fastest overall times in both the heats and semifinals. Lyles, 25, is the defending world champ and took bronze at the Tokyo Olympics. Knighton is an 18-year-old phenom who placed fourth in Tokyo and earlier this year ran a world-leading 19.49 seconds to overtake Lyles as the fourth-fastest 200m runner of all time, behind Usain Bolt, Yohan Blake and Michael Johnson.

Also lining up tonight is American Kenny Bednarek, who took silver in Tokyo and gives the U.S. a good chance of sweeping the medals here. 100m champ Fred Kerley's hopes of winning a world-championship double were dashed when the American failed to advance past the semifinals.

The women's 200m final goes right before the men's, at 10:35 p.m. ET. The