The 2003 WGC-NEC Invitational was a golf tournament that was contested from August 21–24, 2003 over the South Course at Firestone Country Club in Akron, Ohio. It was the fifth WGC-NEC Invitational tournament, and the second of four World Golf Championships events held in 2003. Darren Clarke won the tournament to capture his first WGC-NEC Invitational and his second World Golf Championships title.

Field

Rich Beem (4), Ángel Cabrera (4), Michael Campbell (4), Paul Casey (4,5), Fred Couples (4,5), Ben Curtis (4,5), Bob Estes (4), Nick Faldo, Brad Faxon (4), Trevor Immelman, Freddie Jacobson (4), Jonathan Kaye (5), Len Mattiace (4), Rocco Mediate (4), Chris Riley (4), John Rollins (4,5), Eduardo Romero (4), Justin Rose (4), Jeff Sluman (4) Chad Campbell, Alex Čejka (5), Shaun Micheel (5) Stephen Allan, Bob Burns, Jonathan Byrd, Ben Crane, Robert-Jan Derksen, Steve Flesch, Dan Forsman, Ignacio Garrido, Philip Golding, Peter Jacobsen, Robert Karlsson, Craig Parry, Ian Poulter, Rory Sabbatini, Gene Sauers, Steen Tinning, Kaname Yokoo

Round summaries

First round

Second round

Third round

Final round