It's the final day of pool play with several win-or-go-home matches at the WGC-Dell Match Play. Follow along here to see who advances to the Round of 16:
Group 1: (1) Jordan Spieth def. (31) Justin Thomas, 3 and 2. Spieth (3-0-0) won the second hole and never trailed thereafter against his longtime friend, easily advancing to the Round of 16. Thomas (0-3-0) didn't win his first hole until No. 10.
Group 1: (51) Jamie Donaldson def. (39) Victor Dubuisson, 1 up. Donaldson (2-1-0) had the lead for every hole but the nith, when Dubuisson (1-2-0) got the match back to all square. Donaldson won the next three holes, however, and hung on for the win.
Group 2: (2) Jason Day def. (25) Paul Casey, WD: Casey (0-2-1) had been battling a stomach virus all week, and after six holes he couldn't continue. Casey won the first two holes, but then Day (3-0-0) was able to level the match at No. 6. That's when Casey decided to withdraw and get ready for the Masters. Meanwhile, Day became the first player to make the Round of 16.
Group 2: (36) Thongchai Jaidee and (62) Graeme McDowell halved. Jaidee (1-1-1) had a one- or two-hole lead through 11 holes, but McDowell (0-1-2) won the 12th with an eagle and the 13th with a par to pull even. They traded wins at 14 and 15, then halved the next three holes for the tie.
Group 3: (3) Rory McIlroy and (26) Kevin Na halved. Na (2-0-1) held the biggest lead in the match, 2 up after six holes. But McIlroy (2-0-1) squared it through nine, and the two battled to a draw on the back. In their playoff, Na hooked his drive into a hazard on the second hole, then hit his third shot into a greenside bunker. McIlroy, with less than a full wedge, missed the green to the right, but managed to get up and down for the win.
Group 3: (64) Thorbjorn Olesen def. (46) Smylie Kaufman, 2 and 1. Neither player could pull more than one hole ahead until Kaufman (0-3-0) bogeyed the 13th to go 2 down. That was enough of a margin for Olesen (1-2-0).
Group 4: (63) Patton Kizzire def. (33) Emiliano Grillo, 2 up. Kizzire (1-0-2) took a 1-up lead by chipping in from 73 feet for eagle at the 16th hole, then birdied the 18th for the win and a spot in the Round of 16. Grillo finished 1-2-0 in pool play.
Group 4: (21) J.B. Holmes def. (4) Bubba Watson, 1 up. Watson (1-1-1) was 2 up through seven holes, but Holmes fought back to all square through 14 when Watson (1-1-1) bogeyed. Another Bubba bogey at 15 gave Holmes a 1-up lead, and both players parred in.
Group 5: (47) Scott Piercy def. (58) Jason Dufner, 1 up. Dufner (1-2-0) led by one or two holes the entire match until No. 16, when Piercy (1-0-2) chipped in for eagle on the par 5. On 18, a wayward drive by Dufner led to a concession and the win for Piercy. Piercy lost a playoff to Byeong-Hun An for a spot in the Round of 16.
Group 5: (5) Rickie Fowler and (27) Byeong-Hun An halved. An (1-0-2) took the biggest lead of the match, 2 up, with a 94-yard hole-out eagle on the 13th and a birdie on the 14th. But Fowler (0-1-2) birdied the short par-4 18th to square the match. An beat Piercy in their playoff for a spot in the Round of 16.
Group 6: (30) Bill Haas def. (6) Adam Scott, 1 up: Haas (3-0-0) just needed a halve to move on, but the match came down to the 18th hole, where Haas made a birdie on the short par 4 to beat Scott (1-1-1) and advance.
Group 6: (55) Thomas Pieters def. (41) Chris Wood, 3 and 2: Pieters (1-1-1) was already 2 up on the par-4 15th, and he went three ahead with a birdie on his way to winning his first match. Wood ended the week 0-3-0.
Group 7: (48) Anirban Lahiri def. (57) Fabian Gomez, 4 and 2. Gomez (0-2-1) won the second hole to go 1 up, but won only one other hole. A Gomez bogey at the 15th gave Lahiri (1-1-1) a 3-up lead, and the winner stretched the margin to 4 up with a birdie at the 16th.
Group 8: (8) Dustin Johnson def. (22) Jimmy Walker, 2 and 1. DJ (2-1-0) took the lead on the fourth hole and never surrendered it. Two up at the turn, he won by the same margin as Walker (1-2-0) never came within one hole. DJ played off against Kiradech Aphibarnrat for a spot in the Round of 16, winning with an opening-hole birdie.
Group 8: (37) Kiradech Aphibarnrat def. (49) Robert Streb, 1 up. An extremely tight match, this one alternated between Aphibarnrat (2-1-0) being 1 up and the match being all square. Streb (1-2-0) never led. Aphibarnrat took his final lead with a birdie on the 13th, and the two matched pars the rest of the way. Aphibarnrat then lost a playoff to Dustin Johnson for a spot in the Round of 16.
Group 9: (42) Matthew Fitzpatrick def. (53) Daniel Berger, WD: This one never got started as Berger (0-3-0) withdrew due to an injured wrist. Berger hit a rock Thursday in his match against Phil Mickelson, and he decided to withdraw and rest up for the Masters. Fitzpatrick finished the week 1-2-0.
Group 9: (9) Patrick Reed def. (17) Phil Mickelson, 5 and 4. Reed (3-0-0) led by 7 up through 10 holes, thanks to two eagles (one a hole-out) and two birdies. Mickelson (2-1-0) cut the lead to 5 up through 13, but Reed closed him out on the next hole, sailing into the Round of 16.
Group 10: (50) Jaco Van Zyl def. (40) Billy Horschel, 2 and 1. One up through 15 holes, Van Zyl (1-1-1) eagled the par-5 16th to beat Horschel's birdie, then matched biries on the par-3 17th to close out the match. Horschel finished 1-2-0.
Group 10: (10) Danny Willett def. (18) Brooks Koepka, 4 and 3. Willett (1-1-1) probably got a clue that it was his day when he won the second hole with a bogey to Koepka's double. Willett was 5 up at the turn, and though Koepka (2-1-0) won the next two holes, it was too little, too late. Koepka advanced to the Round of 16, though.
Group 11: (11) Branden Grace def. (32) Russell Knox, 5 and 4: Knox (1-1-1) controlled his own destiny, but he was never in this match against Grace (2-1-0). Grace birdied Nos. 5 and 6 to take a 2-up lead, and then he just needed a par on 7 to go 3 up. Knox's chances pretty much ended when he found the water on the par-3 11th and conceded the hole. Grace lost a playoff to Chris Kirk for a spot in the Round of 16.
Group 11: (56) Chris Kirk def. (38) David Lingmerth, 3 and 2: Kirk (2-1-0) was 2 up after two holes, and he never looked back against Lingmerth (0-2-1). Kirk defeated Grace in a playoff for a spot in the Round of 16.
Group 12: (43) Soren Kjeldsen and (52) Rafa Cabrera Bello halved. Kjeldsen (0-2-1) led 1 up at the turn as Cabrera Bello (2-0-1) made only one birdie on the front side. Kjeldsen was 1 up through 17, but Cabrera Bello birdied the par-4 18th to earn the half-point and advance.
Group 12: (12) Hideki Matsuyama def. (20) Kevin Kisner, 3 and 2. After the two halved the first seven holes, Kisner (1-2-0) bogeyed No. 8, giving Matsuyama (2-1-0) a lead he would never relinquish. Kisner didn't win a hole until No. 14, his only win of the day.
Group 13: (13) Sergio Garcia def. (25) Marc Leishman (25), 5 and 4. Garcia (2-1-0) quickly went 3 up as Leishman (0-2-1) bogeyed three of the first four holes. Garcia put the match away by winning Nos. 10, 13 and 14.
Group 14: (14) Zach Johnson def. (24) Shane Lowry, 4 and 3: Johnson (3-0-0) dominated this group and advanced to the Round of 16. Lowry (0-2-1) was 5 down after 10 holes and was never able to recover.
Group 15: (15) Brandt Snedeker def. (19) Charl Schwartzel, 5 and 3. Schwartzel (2-1-0) actually led, 1 up, through seven holes, but bogeyed the eighth and ninth to give Snedeker (2-0-1) a 1-up lead. Schwartzel drew even with a birdie on No. 10, but Snedeker then won the next five holes and advanced.
Group 15: (56) Charley Hoffman def. (34) Danny Lee, 4 and 2. Hoffman (1-2-0) won the first hole and led the entire match, including winning the par-3 11th with a double bogey to Lee's triple. Lee finished 0-2-1.
Group 16: (16) Louis Oosthuizen def. (29) Andy Sullivan, 4 and 2. A one-hole match through 13 holes, Oosthuizen (3-0-0) won the next three holes to advance. Sullivan finished 2-1-0.
Group 16: (35) Bernd Weisberger and (61) Matt Jones halved. Weisberger (0-2-1) led from the second hole through the 17th. He was 3 up after 15, but Jones (0-2-1) birdied the last three holes in a meaningless match