Rory McIlroy and Scottie Scheffler, who together have won four of the past five major titles, have impressed each other with their mental focus and golfing skills.

As world No. 1?Scheffler and second-ranked McIlroy prepared to face a world-class field at Aronimink in the 108th PGA Championship, which starts?Thursday, they examined each other¡¯s most formidable strengths.

Scheffler captured last year¡¯s PGA Championship at Quail Hollow and British Open at Royal Portrush, while McIlroy took the green jacket at the Masters last month and last year.