Those hoping to see Brooks Koepka and Bryson DeChambeau grouped together for Rounds 1 and 2 of the U.S. Open will have to keep waiting.

Koepka will play alongside Justin Thomas and Collin Morikawa to begin his quest for a third U.S. Open title. The trio of major champions tees off at 10:29 a.m. ET on Thursday.

As for DeChambeau, who's defending his U.S. Open title, he'll be with reigning Masters champion Hideki Matsuyama and 2020 U.S. Amateur winner Tyler Strafaci. DeChambeau and Co. kick their weeks off at Torrey Pines at 4:14 p.m. on Thursday.

Here are all the notable opening-round groups (all times ET):

Group: Shane Lowry, Henrik Stenson, Francesco Molinari
Thursday - 10:29 a.m.
Friday - 4:14 p.m.*

Group: Brooks Koepka, Justin Thomas, Collin Morikawa
Thursday - 10:29 a.m.*
Friday - 4:14 p.m.

Group: Tyrrell Hatton, Viktor Hovland, Matt Fitzpatrick
Thursday - 10:40 a.m.
Friday - 4:25 p.m.*

Group: Webb Simpson, Gary Woodland, Martin Kaymer
Thursday - 10:51 a.m.
Friday - 4:36 p.m.*

Group: Phil Mickelson, Xander Schauffele, Max Homa
Thursday - 10:51 a.m.*
Friday - 4:36 p.m.

Group: Tony Finau, Abraham Ancer, Daniel Berger
Thursday - 11:02 a.m.
Friday - 4:47 p.m.*

Group: Bryson DeChambeau, Hideki Matsuyama, Tyler Strafaci
Thursday - 4:14 p.m.
Friday - 10:29 a.m.*

Group: Paul Casey, Lee Westwood, Stewart Cink
Thursday - 4:14 p.m.*
Friday - 10:29 a.m.

Group: Adam Scott, Sergio Garcia, Bubba Watson
Thursday - 4:25 p.m.
Friday - 10:40 a.m.*

Group: Jordan Spieth, Will Zalatoris, Scottie Scheffler
Thursday - 4:25 p.m.*
Friday - 10:40 a.m.

Group: Dustin Johnson, Rory McIlroy, Justin Rose
Thursday - 4:36 p.m.
Friday - 10:51 a.m.*

Group: Marc Leishman, Jon Rahm, Patrick Reed
Thursday - 4:36 p.m.*
Friday - 10:51 a.m.

Group: Patrick Cantlay, Sungjae Im, Louis Oosthuizen
Thursday - 4:47 p.m.*
Friday - 11:02 a.m.

* Denotes starting on 10th hole.

The full list of groups and tee times can be found here.