All three Scots in the field for the World Golf Championship have been knocked out at the first knockout stage.
Stephen Gallacher lost to Ian Poulter 2&1 and Richie Ramsay fell to South African Louis Oosthuizen by the same margin.
And there was disappointment for Paul Lawrie as he stumbled to a 4 & 3 defeat by Scott Piercy.
The 64-man field are vying for prize money of more than 1.1 million euros.
Rory McIlroy and Tiger Woods also bowed out, losing to Shane Lowry and Charles Howell III, respectively.
First-round results (US unless stated):
Sergio Garcia (Spa) bt Thongchai Jaidee (Tha) 1 up
Matt Kuchar bt Kasumi Fujii (Jpn) 3 & 2
Ian Poulter (Eng) bt Stephen Gallacher (Sco) 2 & 1
Bo Van Pelt bt John Senden (Aus) 6 & 5
Charl Schwartzel (Rsa) lost to Russell Henley 1 down
Zach Johnson lost to Jason Day (Aus) 6 & 5
Jason Dufner lost to Richard Sterne (Rsa) 1 down
Hunter Mahan bt Matteo Manassero (Ita) 5 & 4
Justin Rose (Eng) bt K J Choi (Kor) 2 & 1
Bill Haas lost to Nicolas Colsaerts (Bel) 5 & 4
Adam Scott (Aus) lost to Tim Clark (Rsa) 2 & 1
Jamie Donaldson (Wal) lost to Thorbjorn Olesen (Den) 3 & 2
Bubba Watson bt Chris Wood (Eng) 2 & 1
Jim Furyk bt Ryan Moore 4 & 2
Lee Westwood (Eng) lost to Rafael Cabrera Bello (Spa) 1 down
Martin Kaymer (Ger) bt George Coetzee (Rsa) 2 & 1
Keegan Bradley lost to Marcus Fraser (Aus) 1 down
Ernie Els (Rsa) lost to Fredrik Jacobson (Swe) 1 down
Steve Stricker bt Henrik Stenson (Swe) 5 & 4
Nick Watney bt David Toms 5 & 4
Dustin Johnson lost to Alexander Noren (Swe) 6 & 4
Graeme McDowell (NIrl) bt Padraig Harrington (Irl) 2 up
Webb Simpson bt David Lynn (Eng) 5 & 4
Peter Hanson (Swe) bt Thomas Bjorn (Den) 3 & 2
Louis Oosthuizen (Rsa) bt Richie Ramsay (Sco) 2 & 1
Branden Grace (Rsa) lost to Robert Garrigus 4 & 3
Luke Donald (Eng) bt Marcel Siem (Ger) 1 up
Paul Lawrie (Sco) lost to Scott Piercy 4 & 3
Rory McIlroy (NIrl) lost to Shane Lowry (Irl) 1 down
Tiger Woods lost to Charles Howell III 2 & 1