Jason Day: Mental strength will be the key element at US Open

Jason Day believes his US Open record and the bad attitude of some of his competitors make him a strong contender to win a second major title at Shinnecock Hills.

Day's form figures in the US Open were an impressive 2-59-2-4-9-8 before last year's missed cut at Erin Hills, which came during a winless season disrupted by his mother's battle with cancer.