* Hooked up to IV drip on greenside
* No sign of trouble (Adds quotes, detail, changes slug)
UNIVERSITY PLACE, Washington, June 19 (Reuters) - Australian golfer Jason Day sent a scare through the U.S. Open when he collapsed on his final hole of the second round, before getting to his feet, completing his round and collapsing again on Friday.
One of the hot favourites for the tournament, Day dropped to the turf in front of a packed grandstand and laid on his back, covering his face as his caddie came to his aid.
Day's wife Ellie told reporters on the edge of the par three ninth green that her husband had felt dehydrated and suffered a dizzy spell as he approached the putting surface.