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Phil Mickelson managed to strike a fan with a stray ball on day two of the US Open on Friday. The 52-year-old was aiming to recover from a sub-par start to this year's tournament, the only major that he is yet to win over the course of his playing career at the highest level.

Mickelson rounded off on Thursday with a disappointing score of eight over-par and was bidding to cut back the deficit with a respectable showing on day two at the Country Club in Massachusetts. His weekend quickly went from bad to worse, though, when he floored a spectator with a wayward shot as he navigated the third hole.

The spectator in question was seen lying flat on his back after he was struck by the ball, which appeared to make contact with his face. A number of fans rushed to check on his wellbeing before Mickelson ventured over