Iga Swiatek sweeps into French Open final, where she faces a surprise

For Sydney McLaughlin-Levrone, what happens in her first outdoor race of 2023 on Friday could dictate the rest of her season. It may impact her 2024 Olympic plans, too.

McLaughlin-Levrone strays from the 400m hurdles — where she is the reigning Olympic and world champion and four times broke the world record — to race her first flat 400m in two years at a Diamond League meet in Paris.

Peacock streams it live from 3-5 p.m. ET. CNBC airs coverage Saturday at 1 p.m. ET.

What we know is this: On Friday, McLaughlin-Levrone will race against the Olympic and world silver medalist in the 400m (Marileidy Paulino of the Dominican Republic) and the 2019 World champion (Salwa Eid Naser of Bahrain).

Next month, McLaughlin-Levrone will race the flat 400m at the USA Track and Field Outdoor Championships, the qualifying meet for August's world championships. She is racing that flat 400m at USATF Outdoors at least in part because she already has a bye into the 400m hurdles at worlds as defending champion.

What we don't know: which race McLaughlin-Levrone will enter at worlds. Her coach, Bobby Kersee, said last month that she will choose between the 400m and 400m hurdles for worlds, should she finish top three in the 400m at USATF Outdoors to qualify in that second event. She will not try a 400m-400m hurdles double at worlds.

McLaughlin-Levrone was asked Thursday which event she would pick if given the choice.

"Is it bad to say I don't know?" she said in a press conference. "Honestly, ask me after tomorrow. I don't know. I’ve got to run this one first and see how it feels."

McLaughlin-Levrone also doesn't know what she will try to race at the 2024 Paris Olympics. Next year, the 400m-400m hurdles double is more feasible given one could do both events without ever racing more than once per day.

"We’re still focused on 2023," McLaughlin-Levrone said. "One step at a time, literally. Obviously that's something as the season comes to an end we’ll kind of start to look and figure out what our plan is for next year."

Here are the Paris entry lists. Here's the schedule of events (all times Eastern):

12:57 p.m. ET — Women's Shot Put1:35 — Women's High Jump2:15 — Women's Discus2:20 — Women's Pole Vault3:04 — Men's 400m Hurdles3:15 — Women's 800m3:19 — Men's Long Jump3:24 — Women's 5000m3:42 — Women's Javelin3:52 — Men's 110m Hurdles4:02 — Women's 400m4:12 — Men's 100m4:22 — Women's 200m4:32 — Men's 3000m Steeplechase4:51 — Men's 800m

Here are six events to watch:

Women's Pole Vault — 2:20 p.m. ETOlympic and world champion Katie Moon won the first two Diamond League meets and again faces some of her biggest domestic and international challengers in Paris. That includes fellow American Sandi Morris, who won the first three Diamond League meets last year, then took silver behind Moon at worlds on count back. Plus 34-year-old Slovenian Tina Sutej, who ranks second in the world this season.

Women's 5000m — 3:24 p.m. ETIncludes the world record holders at 1500m (Kenyan Faith Kipyegon in her first 5000m since 2015), 3000m steeplechase (Kenyan Beatrice Chepkoech) and the 5000m and 10,000m (Ethiopian Letesenbet Gidey). Plus new American 10,000m record holder Alicia Monson, who is third on the U.S. all-time 5000m list at 14:31.11. Shelby Houlihan has the American record of 14:23.92.

Men's 110m Hurdles — 3:52 p.m. ETThe three members of the U.S. Olympic team in Tokyo — Grant Holloway, Devon Allen and Daniel Roberts — could face off for the first time in nearly a year. Holloway, who has a bye into worlds as defending champion, overcame a rare defeat in the Diamond League opener in Rabat to win his last two races. He is the fastest man in the world this year at 13.01 seconds. Allen isn't far behind at 13.12, while Roberts has yet to race the hurdles this outdoor season.

Women's 400m — 4:02 p.m. ETCould very well determine the favorite for worlds. Reigning Olympic and world champion Shaunae Miller-Uibo of the Bahamas is on maternity leave. Paulino is the only other woman to break 49 seconds since the start of the pandemic, and she's done it each of the last two years. Naser is the only other active woman to have broken 49 seconds, doing so in winning the 2019 World title (before she was banned for two years, through the Tokyo Olympics, for missing drug tests). McLaughlin-Levrone's personal best from 2018 is 50.07 seconds, but she was just 18 years old then and focusing on the hurdles. Still, that time would have won the 2022 U.S. title. Last month, University of Arkansas junior Britton Wilson ran the fastest time by an American since 2009 — 49.13 — but she might bypass the flat 400m to focus on the hurdles this summer.

Men's 100m — 4:12 p.m. ETCould be a meeting between the reigning Olympic men's 100m champion (Marcell Jacobs of Italy) and world men's 200m champion (American Noah Lyles), which hasn't happened since the 2009 World Championships 100m final, where Usain Bolt lowered the world record to 9.58 seconds and American Tyson Gay was second in a then-American record 9.71. Later in that meet, Bolt won his first world 200m title, a crown he held concurrently with his Olympic 100m titles through his 2017 retirement. But Jacobs, citing nerve pain, scratched out of the last two Diamond League meets, which were to be showdowns with world 100m champion Fred Kerley. Jacobs did show up for Thursday's press conference. Lyles has a bye onto the world team in the 200m, but also wants to make the four-man U.S. team in the 100m. He ranks fifth among Americans by best time this season — 9.95.

Men's 800m — 4:51 p.m. ETThe top five from the world championships are entered, led by Olympic and world champion Emmanuel Korir of Kenya. This event was in an international doldrums for much of the time since Kenyan David Rudisha repeated as Olympic champion in 2016, then faded away from competition. But the emergence of 18-year-old Kenyan Emmanuel Wanyonyi has injected excitement this season. Wanyonyi is the world's fastest man this year. The second-fastest, Kenyan Wycliffe Kinyamal, is also in this field.

Correction: An earlier version of this post incorrectly reported the TV window for the meet broadcast. The CNBC broadcast begins at 1 p.m. ET on Saturday, not 3.

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