Hideki Matsuyama will "keep on grinding" after carding the lowest score in the U.S. Open on Sunday.

Posting a 65, Matsuyama was five under on the final round and finished the tournament three under overall.

Matsuyama headed into the clubhouse in fourth place, though his efforts were not enough to put him in contention for success, barring a major slip up from the leaders.

The 2021 Masters champion conceded he did not feel he was at his best over the course of the tournament, though it gives him confidence moving forward and highlighted his putting as a strength.

"To be honest, I don't feel like this is my 100 per cent performance, but it does give me a lot of boost on my confidence," Matsuyama said.

"So, I'll try my best, try to connect this momentum to my next game, and I'll be prepared for it.

"Definitely my putting was helping my game a lot. Rolling really good putts. 

"My shots were pretty decent too. I was able to target most of the greens, so I think that really helped me."

Matsuyama also downplayed the importance of his performance in last year's Masters and outlined consistency as an area he needs to improve.

"To be honest, I'm not really thinking about that," he said. "I'm just trying to play my best game always. So just keep on grinding and trying my best.

"If I can be a little bit greedy, I feel like, if I can play a little bit better on the first, second, and third day, that's one of the things I'm working on, trying to be consistent four days. I'll try my best."