Natasha Hastings of U.S. on the starting block before the women’s 400 metres heats during the 15th IAAF World Championships at the National Stadium in Beijing, China August 24, 2015.

Just as she did in her qualifying heat the day before, Tate beat South Africa’s Wenda Nel (54.63) to the finish line in the first of three semifinal heats in Monday’s evening session at the National Stadium.

A Chinese official gestures as eventual gold medallist Spain’s Miguel Angel Lopez competes in the men’s 20k race walk final at the World Athletics Championships at the in Beijing, Sunday, August 23, 2015. Picture taken using multiple exposures. She arrived in Beijing in this year’s IAAF World Championships as the No. 4-ranked performer worldwide for the 2015 season with her personal best of 54.01 set at the USA Track & Field Championships in June.

Competitors in the 20-kilometer walk have left the stadium at the start of Day 2 at the world championships.

French Renaud Lavillenie photographed in mid air while jumping over a pole in the men’s Pole Vault final.

Stephanie Garcia of the US competes in the women’s 3000m Steeplechase heats.

Three years after the 2012 London Games, and now a mother, Jessica Ennis-Hill remains the heptathlon standout she once was.

Serbia’s Asmir Kolasinac pats dust on his neck before he competes in the qualifying round of the men’s shot put athletics event.

Canadians will also compete in the women’s 400-metre hurdles semifinals (7:10 a.m. ET), the women’s 10,000m final (8:35 a.m. ET) and the men’s 3,000m steeplechase final (9:15 a.m. ET).

Netherlands’ Nadine Visser in mid pose after having thrown her javelin in the women’s heptathlon athletics event.

Time Schedule for LSU Entries at the 2015 IAAF World Championships in AthleticsNote: Times are Central and subject to change based on round-by-round qualifying and weather delays.

An aerial view of Jessica Ennis-Hill of Great Britain lands in the sand after finishing a jump in the Women’s Heptathlon Long Jump.

Caterine Ibarguen of Colombia competes in the women’s triple jump final during the 15th IAAF World Championships at the National Stadium in Beijing, China, August 24, 2015.