Jordan Spieth was left to lament a slack finish to his third round after he came up just short at The Open on Sunday.

The 2017 Champion Golfer of the Year recovered from two over through six to sign for a final-round 66, which left him two shots shy of winner Collin Morikawa.

But it was Saturday's round at Royal St George's that bothered the three-time major winner, who dropped shots at each of the last two holes.

Reflecting on a close call with what would have been a first major triumph since that success at Royal Birkdale four years ago, Spieth was quick to point out where it went wrong.

"It's hard to be upset when I was a couple over through six," he said. "I couldn't have really done much more after that point.

"But the finish yesterday was about as upset as I've taken a finish of a round to the house. I walked in and I said: 'Is there something that I can break?'.

"I knew that was so important because I would have been in the final group."

Spieth is usually a safe bet with the putter in his hand, but the 27-year-old felt that side of his game was lacking in Kent.

He took 1.58 putts per greens in regulation, which was better than the field average of 1.68, but Spieth felt he was well short of his own high standard.

"My putting is not where I want to be at all," conceded. "I say at all; It's progressing the right direction, but it's not where it has been.

"I know what needs to do to get there, and it's just very difficult to do. But it's rounds like today or this week, major championship rounds, where you have to obviously test not only your touch out here, but also a lot of knobs and breaking putts and trust lines. It's a good test for it.

"I just wasn't extremely sharp with the putter this week. I was sharper than I was at Augusta, and it's been a little bit kind of here and there this year.

"My bad weeks have been okay and my good weeks are really good, but I needed to put in a little bit of work."

Paying tribute to champion Morikawa, who has two major wins from eight starts, Spieth added: "He swings the club beautifully, gets it in positions that make it very, very difficult to not start the ball online, so therefore, he's going to be very consistent tee to green.

"At 24, obviously there's a bright future ahead."