Rory McIlroy said he and co-leader Viktor Hovland "fed off each other" in a thrilling third-round pairing at the Open Championship.

The duo each carded 66s on moving day at St Andrews to share the 54-hole lead on 16 under par, four shots ahead of nearest rivals Cameron Smith and Cameron Young.

McIlroy's stunning hole-out eagle from the bunker on 10 was the highlight of his round, though he gave a shot back on 17th after clattering into the wall down the right side of the notoriously tricky Road Hole.

A pair of birdies at the last ensured McIlroy and Hovland will head out on Sunday level pegging in pursuit of the Claret Jug at the landmark 150th edition of golf's oldest major.

"I thought it was really good," the Northern Irishman, who was crowned Champion Golfer of the Year in 2014, said of his round. 

"I missed some opportunities early and Viktor holed a couple of long ones early on.

"But I stayed really patient, got my first birdie of the day on five, and I feel like my patience was rewarded around the turn with a couple of birdies and that hole-out on 10.

"Overall, a really good day. We sort of fed off each other, and navigated the last few holes well. It was tricky coming in there.

"When you're a couple off the lead going into the third day of The Open and you go out and shoot a six under, you're always going to be pleased with that."

McIlroy had magnificent backing from huge crowds on a glorious day on the Fife coast and he was grateful for it, but keen not to get carried away.

"The support that I've gotten this week has been absolutely incredible," said the four-time major winner. 

"I appreciate it and I feel it out there, but at the same time I'm trying my hardest just to stay in my own little world because that's the best way for me to get the best out of myself.

"I try to acknowledge as much as I can, but I'm just trying to stay in my process, stay in my own little bubble and I just have to do that for one more day.

"I just have to just stick to my game plan, stick to the process. The more people bring up the result, the more I'm just going to harp on about process and sticking to my game plan, because that's the only thing I can do, and I've done that well for the last three days.

"It's put me in this position. I just need to do it for one more day."