World number one Dustin Johnson will launch his bid for a maiden Masters title in the company of twice champion Bubba Watson and PGA Championship winner Jimmy Walker, in groupings announced on Tuesday.
Johnson, who has won his last three starts, will tee off in the final group at 14:03 ET (19:03 BST) in Thursday's opening round at Augusta National.
Australian world number three Jason Day, who took a short break from golf as his mother had surgery in her battle with lung cancer, has been paired with England's Justin Rose and American Brandt Snedeker.
The trio will set off at 10:56 (15:56 BST)right behind gallery favourite and three-times Masters champion Phil Mickelson, Spain's Rafael Cabrera-Bello and South Korea's Kim Si-woo.
Defending champion Danny Willett will tee off at 12:24 (19:24 BST) along with Matt Kuchar and Australian amateur Curtis Luck.
Former champion Spieth, who was leading in the final round last year until falling apart by dropping six shots in three holes, will set off with Germany's Martin Kaymer and England's Matthew Fitzpatrick.
Spaniard Sergio Garcia's bid for his maiden major title will open with England's Lee Westwood, who finished runner-up here last year, and Ireland's Shane Lowry.
In other groupings, Japan's Hideki Matsuyama will set off with Rickie Fowler and Scotland's Russell Knox while Swedish world number five Henrik Stenson was paired with twice major winner Angel Cabrera of Argentina and England's Tyrrell Hatton.
First off at 8:00 a.m. following ceremonial tee shots by golfing greats Jack Nicklaus and Gary Player will be Americans Daniel Summerhays and Russell Henley, who secured his Masters invite by winning in Houston on Sunday.
Groupings remain the same for the second round, though the tee times change, with those who play early on Thursday going out late on Friday, and vice-versa.
Thursday's tee-times at Augusta (all times BST)
- 13:00 Daniel Summerhays, Russell Henley
- 13:11 Trevor Immelman (Rsa), Brendan Steele, Jhonattan Vegas (Ven)
- 13:22 Mike Weir (Can), Billy Hurley III, Scott Piercy
- 13:33 Larry Mize, Brian Stuard, Stewart Hagestad (a)
- 13:44 Soren Kjeldsen (Den), Kevin Chappell, Jim Furyk
- 13:55 Sandy Lyle (Sco), Sean O'Hair, Scott Gregory (a) (Eng)
- 14:06 Zach Johnson, Louis Oosthuizen (Rsa), Adam Hadwin (Can)
- 14:17 Tommy Fleetwood (Eng), Gary Woodland, J.B. Holmes
- 14:28 Adam Scott (Aus), Kevin Kisner, Andrew Sullivan (Eng)
- 14:39 Francesco Molinari (Ita), Daniel Berger, Thomas Pieters (Bel)
- 15:01 Fred Couples, Paul Casey (Eng), Kevin Na
- 15:12 Russell Knox (Sco), Rickie Fowler, Hideki Matsuyama (Jpn)
- 15:23 Branden Grace (Rsa), Brooks Koepka, Jeung-Hun Wang (Kor)
- 15:34 Jordan Spieth, Martin Kaymer (Ger), Matthew Fitzpatrick (Eng)
- 15:45 Phil Mickelson, Rafael Cabrera-Bello (Spa), Si Woo Kim (Kor)
- 15:56 Justin Rose (Eng), Brandt Snedeker, Jason Day (Aus)
- 16:07 Rod Pampling (Aus), William McGirt
- 16:18 Mark O'Meara, Roberto Castro, Hudson Swafford
- 16:29 Ian Woosnam (Wal), Brad Dalke (a), James Hahn
- 16:40 Ross Fisher (Eng), Pat Perez, Byeong-Hun An (Kor)
- 16:51 Jose-Maria Olazabal (Spa), Webb Simpson, Ryan Moore
- 17:13 Ernie Els (Rsa), Jason Dufner, Bernd Wiesberger (Aut)
- 17:24 Danny Willett (Eng), Matt Kuchar, Curtis Luck (a) (Aus)
- 17:35 Vijay Singh (Fij), Emiliano Grillo (Arg), Toto Gana (a) (Chi)
- 17:46 Angel Cabrera (Arg), Tyrrell Hatton (Eng), Henrik Stenson (Swe)
- 17:57 Charl Schwartzel (Rsa), Steve Stricker, Mackenzie Hughes (Can)
- 18:08 Charley Hoffman, Chris Wood (Eng), Yuta Ikeda (Jpn)
- 18:19 Sergio Garcia (Spa), Lee Westwood (Eng), Shane Lowry (Irl)
- 18:30 Bernhard Langer (Ger), Alex Noren (Swe), Patrick Reed
- 18:41 Rory McIlroy (Nirl), Hideto Tanihara (Jpn), Jon Rahm (Spa)
- 18:52 Marc Leishman (Aus), Bill Haas, Justin Thomas7
- 19:03 Bubba Watson, Dustin Johnson, Jimmy Walker
Read the original article on Eurosport: McIlroy out with Rahm and Tanihara in quest for career Grand Slam