NEW YORK, June 15 (Reuters) - American ⁠Scottie Scheffler faces plenty of opposition on his hunt for a career Grand Slam whenthe U.S. ⁠Open begins on Thursday in Southampton, New York, the genteel slice of Long Island that the ‌rough and ruthless Shinnecock Hills Golf Club calls home.

World number one Scheffler hopes to underline his claim to be the world's most dominant golfer after adding PGA Championship and Open Championship titles last year to his pair of Masters wins, with seven top-five finishes so ​far this year.