Open Championship tee times: Defending champ Schauffele, Scheffler groups out early

The 153rd Open Championship begins at 1:35 a.m. ET Thursday morning at Royal Portrush Golf Club in Northern Ireland.

Below are the scheduled pairings for the opening round and viewing options.

Thursday's featured groups

(All times ET)

4:58 a.m. -- Xander Schauffele, J.J. Spaun, Jon Rahm

5:09 a.m. -- Shane Lowry, Collin Morikawa, Scottie Scheffler

9:48 a.m. -- Robert MacIntyre, Bryson DeChambeau, Justin Rose

9:59 a.m. -- Jordan Spieth, Ludvig Aberg, Viktor Hovland

10:10 a.m. -- Rory McIlroy, Justin Thomas, Tommy Fleetwood

First round tee times

(All times ET; (a) amateur)

1:35 a.m. -- Padraig Harrington, Nicolai Hojgaard, Tom McKibbin

1:46 a.m. -- Louis Oosthuizen, Guido Migliozzi, K.J. Choi

1:57 a.m. -- Cameron Smith, Marco Penge, Justin Hastings (a)

2:08 a.m. -- Jason Day, Taylor Pendrith, Jacob Skov Olesen

2:19 a.m. -- Phil Mickelson, Daniel van Tonder, Ryan Peake

2:30 a.m. -- Max Greyserman, Byeong Hun An, Niklas Norgaard

2:41 a.m. -- Jordan Smith, Haotong Li, Dustin Johnson

2:52 a.m. -- Darren Clarke, Davis Riley, Lucas Herbert

3:03 a.m. -- Kevin Yu, Julien Guerrier, Mikiya Akutsu

3:14 a.m. -- Thomas Detry, Chris Gotterup, Lee Westwood

3:25 a.m. -- Patrick Cantlay, Cameron Young, Mackenzie Hughes

3:36 a.m. -- Thorbjorn Olesen, Matthew Jordan, Filip Jakubcik (a)

3:47 a.m. -- Henrik Stenson, Stephan Jaeger, Sebastian Soderberg

4:03 a.m. -- Kristoffer Reitan, Martin Couvra, Adrien Saddier

4:14 a.m. -- Takumi Kanaya, Justin Walters, Bryan Newman (a)

4:25 a.m. -- Hideki Matsuyama, Ryan Fox, Matt Fitzpatrick

4:36 a.m. -- Sepp Straka, Ben Griffin, Akshay Bhatia

4:47 a.m. -- Sam Burns, Aldrich Potgieter, Brooks Koepka

4:58 a.m. -- Xander Schauffele, J.J. Spaun, Jon Rahm

5:09 a.m. -- Shane Lowry, Collin Morikawa, Scottie Scheffler

5:20 a.m. -- Corey Conners, Wyndham Clark, Tom Hoge

5:31 a.m. -- Denny McCarthy, Nico Echavarria, Patrick Reed

5:42 a.m. -- Matt Schmid, Ryggs Johnston, Richard Teder (a)

5:53 a.m. -- Dylan Naidoo, Darren Fichardt, John Axelsen

6:04 a.m. -- Justin Suh, Oliver Lindell, Jesper Sandborg

6:15 a.m. -- Sadom Kaewkanjana, Riki Kawamoto, Sampson Zheng

6:26 a.m. -- Stewart Cink, Matteo Manassero, Marc Leishman

6:47 a.m. -- Francesco Molinari, Jesper Svensson, Connor Graham (a)

6:58 a.m. -- Zach Johnson, Daniel Hillier, Daniel Brown

7:09 a.m. -- Adam Scott, Rickie Fowler, Ethan Fang (a)

7:20 a.m. -- Laurie Canter, Elvis Smylie, Sergio Garcia

7:31 a.m. -- Andrew Novak, Matthieu Pavpn, Matt Wallace

7:42 a.m. -- Davis Thompson, Dean Burmester, Rikuya Hoshino

7:53 a.m. -- Si Woo Kim, Shugo Imahira, Sebastian Cave (a)

8:04 a.m. -- Michael Kim, Bud Cauley, John Parry

8:15 a.m. -- Matt McCarty, Shaun Norris, Angel Hidalgo

8:26 a.m. -- Keegan Bradley, Sungjae Im, Daniel Berger

8:37 a.m. -- Rasmus Hojgaard, Christiaan Bezuidenhout, Romain Langasque

8:48 a.m. -- Aaron Rai, Sahith Theegala, Harry Hall

9:04 a.m. -- Justin Leonard, Thriston Lawrence, Antoine Rozner

9:15 a.m. -- J.T. Poston, Chris Kirk, Carlos Ortiz

9:26 a.m. -- Brian Harman, Maverick McNealy, Joaquin Niemann

9:37 a.m. -- Russell Henley, Tyrrell Hatton, Min Woo Lee

9:48 a.m. -- Robert MacIntyre, Bryson DeChambeau, Justin Rose

9:59 a.m. -- Jordan Spieth, Ludvig Aberg, Viktor Hovland

10:10 a.m. -- Rory McIlroy, Justin Thomas, Tommy Fleetwood

10:21 a.m. -- Harris English, Nick Taylor, Tony Finau

10:32 a.m. -- Lucas Glover, Johnattan Vegas, Tom Kim

10:43 a.m. -- Brian Campbell, John Catlin, Frazer Jones (a)

10:54 a.m. -- Nathan Kimsey, Jason Kokrak, Cameron Adam (a)

11:04 a.m. -- Daniel Young, Curtis Luck, Curtis Knipes

11:16 a.m. -- Younghan Song, George Bloor, O.J. Farrell

How to watch The Open Championship

(All times ET)

1:30-4 a.m.: Stream on Peacock

4 a.m-3:30 p.m.: USA Network, NBC Sports app, Peacock, Fubo

3:30-6 p.m.: Golf Channel

--Field Level Media