Johnson leads the way at St Andrews

Big-hitting American Dustin Johnson insists he is over his last major heartbreak but, despite taking the first-round lead at the Open, having Jordan Spieth in close pursuit will give him a constant reminder.

Johnson fired a seven-under 65 at St Andrews for a one-stroke advantage over the field but his Chambers Bay tormentor is only two shots back as he chases a historic single-season grand slam.