Day 2 of track and field at the Tokyo Olympics is Saturday in Japan, or Friday night into Saturday morning stateside.
There are finals in the women's 100m final, mixed 4x400m relay and men's discus throw.
Other notable events include: women's 800m semifinals; first rounds in the women's 400m hurdles, men's 100m, women's 100m hurdles and men's 800m; and qualifying in men's pole vault and women's discus; and more.
Women's 400m Hurdles
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1st Round (8pET)
Fresh off breaking the world record at U.S. Olympic Trials last month, American Sydney McLaughlin looks to advance to the semifinals alongside teammate and previous record-holder Dalilah Muhammad, the defending Olympic and reigning world champion. Also in the mix: up-and-coming Dutch hurdler Femke Bol.
Heat 3: McLaughlin (USA)
Heat 4: Bol (NED)
Heat 5: Muhammad (USA)
American record-holder Valarie Allman enters with the world No. 2 mark this year, a 70.01m from U.S. Trials.
Two-time defending Olympic champion Sandra Perkovic of Croatia isn't too far behind and brings experience.
Men's Pole Vault
Missing the from the field is two-time reigning world champion Sam Kendricks, who tested positive for COVID-19.
The 2016 Olympic bronze medalist's absence leaves it virtually wide open for world record-holder Mondo Duplantis.
1st Round (8:50pET)
Another event missing a big star: reigning world champion Donavan Brazier didn't make the team at U.S. Trials.
Botswana's Nijel Amos, the 2012 Olympic silver medalist, enters as the world leader with the only sub-1:43 of the year.
Heat 1: Jewett (USA)
Heat 3: Murphy (USA)
Heat 4: Amos (BOT)
Heat 6: Hoppel (USA), Korir (KEN)
Women's 100m Hurdles
1st Round (9:45pET)
World record-holder Keni Harrison of the U.S. already accomplished a feat she'd dreamt of for years, winning at U.S. Olympic Trials to make the Olympic team. And her journey isn't over as she now pursues Olympic gold.
The U.S. swept the 2016 Rio Games podium in this event, but that's unlikely to happen again in Tokyo as none return.
Puerto Rican Jasmine Camacho-Quinn is the world leader having clocked 12.32 in April.
Heat 1: Cindy Sember (GBR)
Heat 2: Keni Harrison (USA)
Heat 3: Tobi Amusan (NGR)
Heat 4: Christina Clemons (USA)
Heat 5: Jasmine Camacho-Quinn (PUR)
Prelim Round (10:35pET)
After the event's preliminary round, unique to the 100m for athletes who've yet to achieve the Olympic standard, the men's first-round heats get underway about eight hours later.
1st Round (6:45aET)
The post-Usain Bolt Olympic era officially begins with the event in which he's best known for winning three straight golds: the men's 100m. Bolt accomplished the feat in the 200m as well, and had it not been for Nesta Carter's doping sanction, he'd also have an official three-peat in the 4x100m relay. The Jamaican still holds world records in all three events.
But the men's 100m in particular is deeply engrained in the multinational gathering's storied history. Its opening heat was the very first event held at the inaugural 1896 Athens Games, won by American Francis Lane of Princeton University in 12.2 – who later went on to tie for bronze in the final – and it's been a part of every modern Olympics since.
Before Bolt the United States won back-to-back Olympic golds with Maurice Greene in 2000 and Justin Gatlin in 2004.
American Trayvon Bromell looks to return the U.S. back atop the podium in Tokyo. The 26-year-old's led an incredible comeback story in 2021, one he hopes ends with gold.
After an eighth-place finish in the 100m final at the 2016 Rio Games, the Florida native anchored a 4x100m relay final in which he dove at the line to initially capture bronze. But in doing so he tore his Achilles and left the track in a wheelchair, and the U.S. was later disqualified for a bad exchange that occurred earlier in the race.
Bromell is the world leader, having clocked 9.77 early last month to become the seventh-fastest man all-time, just .01 off compatriot Christian Coleman, who's banned until May 2020.
South African Akani Simbine is the next fastest this year at 9.84, which he ran earlier this month in Hungary. He was fifth in Rio, then fifth and fourth at the most recent world championships.
Andre De Grasse of Canada won bronze at both the 2016 Olympics and 2019 World Championships. His 9.90 personal best is weak in comparison to the field, but always comes up big.
Bromell's teammate Ronnie Baker, a 60m world indoor bronze medalist, has the joint-third fastest time this season at 9.85.
Men's Long Jump
NCAA champion JuVaughn Harrison, 22, continues his quest to double in both the high jump and long jump, a feat not attempted by an American since Jim Thorpe at the 1912 Stockholm Games. Thorpe didn't make the podium in either event but still won gold in both the pentathlon and decathlon.
Harrison has the second-best mark this year at 8.47m (27 ft, 9 ½ in), with which he won U.S. Olympic Trials last month.
The man ahead of him, 23-year-old Miltiadis Tentoglou of Greece, who's best finish at a global championships was 10th at the 2019 World Championships in Doha.
Cuban Juan Miguel Echevarria, also 22, was the bronze medalist in Doha and world indoor champion in 2018. His 8.68m (28 ft, 5 ¾) effort from 2018 makes him the No. 2 jumper since Rio.
Reigning world champion Shelly-Ann Fraser-Pryce of Jamaica, Earth's fastest woman alive, won heat five of the first-round prelims in 10.84, the third-fastest overall. A two-time Olympic gold medalist in the event, having won the 2008 and 2012 titles, Fraser-Pryce clocked 10.63 in June to become the second-fastest woman ever at 100m behind Florence Griffith-Joyner.
Her teammate Elaine Thompson-Herah, the defending Olympic gold medalist, posted the second-fastest heat time, 10.82, with which she won heat two.
The top time was clocked by Ivorian Marie-Josee Ta Lou, who broke her personal best in 10.78 to equal an African record. Great Britain's Dina Asher-Smith also advanced.
Blessing Okagbare of Nigeria won heat six but was subsequently handed a provisional suspension after a positive test for human growth hormone.
Semi 1: Thompson-Herah (JAM), Asher-Smith (GBR),
Semi 2: Ta Lou (CIV), Jackson (JAM)
Semi 3: Fraser-Pryce (JAM)
Reigning world champion Daniel Stahl of Sweden took one attempt in qualifying of 66.12m to finish as the top thrower to advance to the final.
He's the world leader at 70.55m – followed by 22-year-old Slovenian Kristjan Ceh with 70.35m – and the silver medalist from the 2017 World Championships.
The United States women's 800m contingent continues its quest to end the nation's longest women's medal drought on the track, with an outside-chance sweep still possible. Madeline Manning was the last U.S. woman to win 800m gold, 53 years ago at the 1968 Mexico City Games.
Two won their first-round heats, the Olympic rookies — prodigy and world-leader Athing Mu, 19, took heat three in 2:01.10; and 2019 world silver medalist Raevyn Rogers claimed heat four in 2:01.42 — while American record-holder Ajee Wilson, the 2019 world bronze medalist, took second in heat six but posted the third-fastest time overall in 2:00.02.
Jamaica's Natoya Goule, No. 3 in the world this year, was the top qualifier in 1:59.83, just one of two to go sub-2 in the prelims.
Cuba's Rose Mary Almanza and France's Renelle Lamote also won their heats.
Semi 1: Wilson (USA), Goule (JAM)
Semi 2: Mu (USA)
Semi 3: Rogers (USA), Hodgkinson (GBR)
Mixed 4x400m Relay
The U.S. team initially disqualified in prelims but was later reinstated.