Dustin Johnson was heading straight back to his rented house for rest after acing the par three, 16th on the opening day of the 140th Open Championship.

The 27-year old American used a pitching wedge to hole out at the 163-yard par three hole to record a third hole-in-one in his career.

It was the first hole-in-one in an Open since Thomas Levet aced the 15th holes during the final round of the 2009 Open at Turnberry.

However Johnson then revealed he has been taking anti-biotics for a mystery illness.

“I’m not feeling that well, so I’m a little bit under the weather,” he said.

“My glands are swollen.  I’ve got some kind of infection and I’m on anti-biotics.  Sore throat, I don’t know, something.

“So I’m going home to rest.”

It’s little wonder last year’s near Whistling Straits hero was not that excited in shooting a level par 70.

“I’m not very excited at all,” said Johnson.

Johnson had been four over par after 12 holes but played his five in four under par including a birdie at 14, birdie at 15, hole-in-one at 16, birdie at 17 but then a bogey at the last.