The Open Championship isn't over. McIlroy and everyone else in contention have to believe they have a chance. But they're chasing a guy who's almost impossible to catch.

The world No. 1 leads the British Open by four shots and the SI Golf team debates whether the world No. 2 is the man to possibly run him down.

As Scottie Scheffler seemingly romps towards another major title at the Open Championship at Royal Portrush, some magic from local hero Rory McIlroy looms as the American's most-serious challenge.