Already, in eight events the U.S. will be able to send four athletes instead of three due to having the defending champion.

Men’s 100m - Justin Gatlin

Men’s Pole Vault - Sam Kendricks

Men’s Triple Jump - Christian Taylor

Women’s 100m - Tori Bowie

Women’s 400m - Phyllis Francis

Women’s 400m Hurdles - Kori Carter

Women’s 3K Steeplechase - Emma Coburn

Women’s Long Jump - Brittney Reese

But what about the 2019 Diamond League bye??

Here are potentially 14 other events the U.S. might also be able to send four athletes if an American wins the 2019 Diamond League final or Hammer Throw Challenge series.

Men’s 200m

Potential DL Champion: Noah Lyles -or- Christian Coleman

Men’s 400m

Potential DL Champion: Michael Norman -or- Fred Kerley

Men’s 800m

Potential DL Champion: Donavan Brazier -or- Clayton Murphy

Men’s 5,000m

Potential DL Champion: Paul Chelimo

Men’s 110m Hurdles

Potential DL Champion: Grant Holloway -or- Daniel Roberts

Men’s 400m Hurdles

Potential DL Champion: Rai Benjamin

Men’s Shot Put

Potential DL Champion: Ryan Crouser -or- Darrell Hill

Women’s 800m

Potential DL Champion: Ajee’ Wilson

Women’s 1500m

Potential DL Champion: Shelby Houlihan -or- Jenny Simpson

Women’s 100m Hurdles

Potential DL Champion: Keni Harrison, Sharika Nelvis -or- Christina Clemons

Women’s Pole Vault

Potential DL Champion: Sandi Morris -or- Jenn Suhr

Women’s Triple Jump

Potential DL Champion: Keturah Orji -or- Tori Franklin

Women’s Shot Put

Potential DL Champion: Chase Ealey -or- Michelle Carter

Women’s Hammer Throw

Potential HT Challenge Champion: Gwen Berry