Pool play
Players were divided into 16 groups of four players and played round-robin matches Wednesday to Friday.
- Round 1 – March 22
- Round 2 – March 23
- Round 3 – March 24
Notes: Round 1
Of the 32 matches played, 10 were "upsets" with the lower seeded player beating the higher seeded player and 5 matches were halved. These included top seeds #2 Rory McIlroy, #5 Jordan Spieth, and #11 Danny Willett losing matches, #3 Jason Day conceding his match and withdrawing from the tournament and #4 Hideki Matsuyama, #7 Sergio García, #9 Patrick Reed, and #16 Matt Kuchar halving matches.[7]
Notes: Round 2
Of the 32 matches played, 15 were upsets with the lower seeded player beating the higher seeded player and 2 matches were halved. These included top seeds #4 Hideki Matsuyama, #6 Justin Thomas, #9 Patrick Reed, #15 Branden Grace and #16 Matt Kuchar losing matches and #3 Jason Day conceding his match. Gary Woodland withdrew from the tournament for personal reasons, conceding his second- and third-round matches and Francesco Molinari withdrew after the second round with a wrist injury, conceding his third-round match. There were 14 players that had perfect 2–0–0 records, including the top seed, Dustin Johnson.[8]
Notes: Round 3
Of the 32 matches played, 14 were upsets with the lower seeded player beating the higher seeded player and 3 matches were halved. These included top seeds #3 Jason Day (concession), #4 Hideki Matsuyama, #6 Justin Thomas, #7 Sergio García, #9 Patrick Reed, #10 Tyrrell Hatton, and #15 Danny Willett losing matches and #2 Rory McIlroy, #5 Jordan Spieth, and #13 Bubba Watson halving matches. Five groups went to sudden-death playoffs, three involving two players and two involving three players. The playoffs went from one to six holes. Eight golfers advanced with perfect 3–0–0 records: #1 Dustin Johnson, #8 Alex Norén, #12 Paul Casey, #14 Phil Mickelson, #20 Brooks Koepka, #21 Jon Rahm, #48 William McGirt, and #62 Søren Kjeldsen. Five of the top 16 seeds advanced while three of the bottom 16 seeds advanced. Nine Americans advance to the round of 16.[9]
More information Round, Winner ...
Group 1
| Round | Winner | Score | Loser |
| 1 | D Johnson | 5 & 3 | Simpson |
| Kaymer | 3 & 2 | Walker |
| 2 | D Johnson | 3 & 2 | Kaymer |
| Walker | 3 & 2 | Simpson |
| 3 | D Johnson | 5 & 3 | Walker |
| Kaymer | 3 & 2 | Simpson |
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Group 2
| Round | Winner | Score | Loser |
| 1 | Kjeldsen | 2 & 1 | McIlroy |
| Woodland | 3 & 2 | Grillo |
| 2 | McIlroy | Conceded | Woodland |
| Kjeldsen | 4 & 3 | Grillo |
| 3 | McIlroy vs Grillo – halved |
| Kjeldsen | Conceded | Woodland |
- Woodland withdrew from the tournament prior to the second round,
conceding matches to McIlroy and Kjeldsen.[10]
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Group 3
| Round | Winner | Score | Loser |
| 1 | Perez | Conceded | Day |
| Leishman | 3 & 2 | Westwood |
| 2 | Westwood | Conceded | Day |
| Perez | 2 & 1 | Leishman |
| 3 | Leishman | Conceded | Day |
| Westwood | 2 & 1 | Perez |
- Day conceded his match with Perez after 6 holes
(Perez 3 up) and withdrew from the tournament.[11]
- Leishman advanced in sudden-death playoff
over Perez and Westwood – 2 holes.
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Group 4
| Round | Winner | Score | Loser |
| 1 | Matsuyama vs Furyk – halved |
| Oosthuizen | 4 & 3 | Fisher |
| 2 | Fisher | 2 & 1 | Matsuyama |
| Furyk | 3 & 2 | Oosthuizen |
| 3 | Oosthuizen | 6 & 4 | Matsuyama |
| Fisher | 4 & 2 | Furyk |
- Fisher advanced in sudden-death playoff over Oosthuizen – 2 holes
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Group 5
| Round | Winner | Score | Loser |
| 1 | Tanihara | 4 & 2 | Spieth |
| Moore vs Ikeda – halved |
| 2 | Spieth | 4 & 2 | Ikeda |
| Moore vs Tanihara – halved |
| 3 | Spieth vs Moore – halved |
| Tanihara | 3 & 1 | Ikeda |
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Group 6
| Round | Winner | Score | Loser |
| 1 | Thomas | 2 & 1 | Wood |
| Na | 5 & 4 | Fitzpatrick |
| 2 | Na | 4 & 2 | Thomas |
| Fitzpatrick | 4 & 2 | Wood |
| 3 | Fitzpatrick | 2 & 1 | Thomas |
| Wood | 2 & 1 | Na |
- Na advanced in sudden-death playoff over Fitzpatrick – 1 hole.
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Group 7
| Round | Winner | Score | Loser |
| 1 | García vs Lowry – halved |
| Rahm | 3 & 2 | Chappell |
| 2 | García | 4 & 3 | Chappell |
| Rahm | 2 & 1 | Lowry |
| 3 | Rahm | 6 & 4 | García |
| Chappell | 1 up | Lowry |
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Group 8
| Round | Winner | Score | Loser |
| 1 | Norén | 3 & 2 | Jaidee |
| Wiesberger | 2 up | Molinari |
| 2 | Norén | 3 & 2 | Wiesberger |
| Jaidee | 5 & 3 | Molinari |
| 3 | Norén | Conceded | Molinari |
| Wiesberger | 1 up | Jaidee |
- Molinari withdrew from the tournament after the second round
with a wrist injury, conceding his third-round match to Norén.[8]
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Group 9
| Round | Winner | Score | Loser |
| 1 | Reed vs Dufner – halved |
| Koepka | 6 & 5 | Kisner |
| 2 | Kisner | 1 up | Reed |
| Koepka | 6 & 5 | Dufner |
| 3 | Koepka | 1 up | Reed |
| Kisner | 2 & 1 | Dufner |
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Group 10
| Round | Winner | Score | Loser |
| 1 | Hatton | 2 & 1 | Howell |
| Cabrera-Bello | 4 & 3 | Wang |
| 2 | Hatton | 2 up | Wang |
| Howell | 1 up | Cabrera-Bello |
| 3 | Cabrera-Bello | 2 & 1 | Hatton |
| Howell | 2 & 1 | Wang |
- Howell advanced in sudden-death playoff
over Hatton and Cabrera-Bello– 6 holes.
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Group 11
| Round | Winner | Score | Loser |
| 1 | KT Kim | 4 & 2 | Willett |
| Knox | 3 & 2 | Haas |
| 2 | Haas | 6 & 5 | Willett |
| KT Kim | 3 & 1 | Knox |
| 3 | Willett | 4 & 2 | Knox |
| Haas | 4 & 2 | KT Kim |
- Haas advanced in sudden-death playoff over Kim – 6 holes.
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Group 12
| Round | Winner | Score | Loser |
| 1 | Casey | 2 & 1 | Luiten |
| Schwartzel | 6 & 5 | An |
| 2 | Casey | 1 up | An |
| Schwartzel | 4 & 3 | Luiten |
| 3 | Casey | 4 & 3 | Schwartzel |
| Luiten | 1 up | An |
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Group 13
| Round | Winner | Score | Loser |
| 1 | Watson | 1 up | Vegas |
| Pieters | 3 & 2 | Piercy |
| 2 | Watson | 4 & 3 | Piercy |
| Vegas | 3 & 1 | Pieters |
| 3 | Watson vs Pieters – halved |
| Vegas | 3 & 1 | Piercy |
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Group 14
| Round | Winner | Score | Loser |
| 1 | Mickelson | 5 & 3 | SW Kim |
| Berger | 7 & 5 | Holmes |
| 2 | Mickelson | 5 & 4 | Berger |
| Holmes vs SW Kim – halved |
| 3 | Mickelson | 6 & 5 | Holmes |
| SW Kim | 1 up | Berger |
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Group 15
| Round | Winner | Score | Loser |
| 1 | Grace | 4 & 2 | Sullivan |
| McGirt | 2 up | Snedeker |
| 2 | McGirt | 2 & 1 | Grace |
| Snedeker | 2 & 1 | Sullivan |
| 3 | Snedeker | 5 & 4 | Grace |
| McGirt | 1 up | Sullivan |
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Group 16
| Round | Winner | Score | Loser |
| 1 | Kuchar vs Steele – halved |
| Fleetwood | 1 up | Z Johnson |
| 2 | Z Johnson | 2 up | Kuchar |
| Steele | 1 up | Fleetwood |
| 3 | Kuchar | 4 & 2 | Fleetwood |
| Z Johnson | 1 up | Steele |
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