Watch live coverage of the World Aquatics Championships from Singapore

Click on the video player above to watch live coverage of Monday's finals session at the World Aquatics Championships in Singapore.

The 23-year-old Saskatoon native lowered the Canadian record in the event during his heat and again in his semifinal to qualify with the fifth-fastest overall time of 1 minute 55.03 seconds.

"I think at trials I didn't really display my best stuff," Tierney said.

"I had an [ankle] injury going into it, so wasn't working the kick a lot. I got that sorted and this meet I've had better prep. You always want to be quicker, so hopefully 1:54 in the final, that would be nice."

Watch live coverage of every race at the swimming worlds on CBCSports.ca and CBC Gem, with finals beginning at 7 a.m. ET each day. The full competition schedule is available here.

Summer McIntosh returns to the pool Friday in order to qualify for her latest showdown with American nemesis Katie Ledecky in the women's 800m freestyle on Saturday morning.

The 18-year-old superstar from Toronto is three-for-three in her pursuit of five individual gold medals at this world championship, having won the 200m butterfly on Thursday to complete a golden hat trick.

McIntosh was visibly frustrated after narrowly missing out on the world record despite cruising to a comfortable victory.

WATCH | CBC Sports' The Ready Room recaps Day 5 of worlds in Singapore:

Summer McIntosh wins 3rd gold medal, Blake Tierney drops Canadian record twice | THE READY ROOM

"It was so close and I know that last 15 metres I took an extra breath and I should've had my head down," she said. "But, I mean, this is definitely going to fuel me for next season, so it leaves a little bit more fuel in the tank and really get closer and closer to that record.

"If