WGC Dell Technologies Mach Play guide

Group 1
Kevin Na is out after his loss against Adam Long on Thursday, but the group is wide open following Dustin Johnson and Robert MacIntyre's halved match. If both Johnson and MacIntyre win their games it is off to extra holes.

Group 2
It's going to a straight shoot out between Kevin Kisner and Matt Kuchar as both Justin Thomas and Louis Oosthuizen are eliminated after losing on day two.

Group 3
Another shoot out between the top two as Jon Rahm takes on Ryan Palmer on day three. Open champion Shane Lowry and Columbian Sebastián Muñoz are out.

Group 4
Group four is wide open but leader J.T. Poston is sitting in the box seat. Colin Morikawa is out after his loss to Max Homa. If Poston beats Max Homa on day three he is through; however, if he loses or halves it Homa and Billy Horschel come into the mix.
Group 5
Wins for Bryson Dechambeau and Tommy Fleetwood on day two have thrown this group wide open with the only certainty that Si Woo Kim is out. If Tommy can beat Bryson on day three he is through with a half, potentially setting up a shoot out against Rozner. If both DeChambeau and Rozner in, they will go to extra holes.

Group 6
Jason Day is out after his defeat to Xander Schauffele. It looks like the match between Schauffele and Scottie Scheffler will decide the group winner but if they halve, it could be a three-way play-off if Andy Sullivan of England beats Day.
Group 7
Our calculators are out for group seven, where Christiaan Bezuidenhout is out but Patrick Reed, Joaquin Niemann or Bubba Watson can progress. If Reed beats Niemann on day three, he is through but a loss puts him out and a half may see him playing off with Watson.
Group 8
Sergio Garcia is in the box seat in group three after his second victory against Tyrrell Hatton on day two. A win or half is good enough for Garcia but a loss potentially sets up a shoot out with Ryder Cup teammate Lee Westwood if the Englishman can beat countryman Matt Wallace.

Group 9
Canadian Mackenzie Hughes leads the group with full points after his win against Webb Simpson. A win or half against the already eliminated Talor Gooch will see him through but a loss may set up a playoff against the winner of the match between Simpson and England's Paul Casey.
Group 10
Patrick Cantlay's win over Carlos Ortiz puts the American in pole position and a win or half with Japan's Hideki Matsuyama who is out after his loss to Brian Harman, will send Cantlay through. If the American loses, it opens up a play-off chance with either Ortiz or Harman.
Group 11
England's Ian Poulter beat Australian Cameron Smith to control group eleven, with Rory McIlroy keeping his chances alive by defeating Lanto Griffin. A win or half against Griffin is good enough for Poulter but a loss sets up the possibility of extra holes against either McIlroy or Smith.

Group 12
The halved match between Tony Finau and Will Zalatoris eliminated both players as South African Dylan Frittelli grabbed his second win against American Jason Kokrak. Frittelli needs just a half from his match on day three with Zalatoris but a loss gives Kokrak a playoff berth if he beats Finau.
Group 13
Slightly surprisingly, Viktor Hovland is eliminated following his loss to Bernd Wiesberger. Wiesberger and Kevin Streelman must hope that Hovland can beat group leader Abraham Ancer to give the winner of their match a chance of forcing extra holes.
Group 14
Group fourteen is one of the two groups with all four players sitting on one point after day two. Anyone of Americans Daniel Berger, Harris English and Brendon Todd and South African Erik van Rooyen could progress.

Group 15
Matthew Wolff and Jordan Spieth share the group lead with England's Matt Fitzpatrick a half-point behind and Canadian Corey Conners eliminated. With Fitzpatrick playing Wolff and Speith playing Conners, any one of the top three could go through, although it is likely one of the Americans will go through.
Group 16
A wide-open group that sees Sungjae Im, Victor Perez, Marc Leishman and Russell Henley all on one point. In this international group, South Korean Im will play Australian Leishman and Perez from France will take on America's Henley. Extra holes are highly likely.