Despite a spectacular hole-in-one at the Open yesterday, world number 12 Dustin Johnson was in no fit state to celebrate.
The big-hitting American, battling against illness, was four-over-par after 12 holes but roared into contention by cramming an eagle and three birdies into a four-hole stretch from the 14th.
Johnson's eagle came at the 163-yard par-three 16th after he struck a big, looping hook that landed on the green before taking a few bounces and diving into the cup.
The hole-in-one seemed to be the last thing on his mind, though, when he walked off the 18th green.
"I'm not very excited at all," Johnson said after carding a level-par 70 first round.
"I'm going to go home and sleep because I'm not feeling that well - my glands are swollen," he explained.
"I've got some kind of infection. I'm on antibiotics so hopefully it'll go away."
Johnson, making his third appearance at the Open after missing the cut at Turnberry in 2009 and finishing tied for 14th at St Andrews last year, said he knew he needed some special golf on the back nine.
"Standing on 14 I wanted to make a few birdies and give myself a chance to get back in this thing," said the 27-year-old.