Day 2 of the World U20 Championships saw the mixed 4x100m relay break records twice. Australia set a new world U20 record with 41.64 seconds, only to be surpassed by Great Britain's 41.60 seconds.

The U.S. finished the heats with 41.82 seconds, showing potential for another record in the final. The event, rarely hosted internationally, saw four teams break the 42-second barrier. Read more racing coverage.

The men's 100m final featured Tate Taylor, Gary Card, and Marko Ferreira on the podium. Taylor's 9.94 seconds surprised many, despite Card being the pre-race leader. Taylor aims for a sprint double at the championships. Related: Taylor and Maxwell Win US 100m Double at World U20 Champs.

This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.