During the second round of the 2015 U.S. Open , Day collapsed after experiencing a dizzy spell and Swatton was the first one there to check on his prized pupil .
By now , most everyone is familiar with Day 's issue with vertigo .
During the second round of the 2015 U.S. Open , Day collapsed after experiencing a dizzy spell and Swatton was the first one there to check on Day 's prized pupil .
By now , most everyone is familiar with Day 's issue with vertigo .