The PGA Championship is an annual golf tournament conducted by the Professional Golfers' Association of America. The PGA is one of the four men's major golf championships and is the only one of the four that is exclusively for professional players.
World number one Scottie Scheffler holds off a rejuvenated Jon Rahm to convert his overnight lead into a maiden US PGA Championship..
Scottie Scheffler struggled on the opening day of the PGA Championship because of mud balls - but what are they?
