World No. 4 golfer Collin Morikawa is warming up to tee off at the 2025 US Open alongside other notable golf stars. Ahead of the tournament, he shared a post on Instagram, showing some clips from his practice round at the iconic Oakmont Country Club.Morikawa secured his maiden PGA Tour title at the Barracuda Championship in 2019, which he won by three strokes ahead of the runner-up. He has won two major championships– the 2020 PGA Championship and the 2021 Open Championship. Should he claim the title at the 2025 US Open, he will be one step closer to securing a career Grand Slam.A day before the first round of the 2025 US Open, Collin Morikawa shared a short video on Instagram showing off his powerful swing while on the course. He captioned the post:“One more sleep until the US Open, time to execute the game plan 🇺🇸”Take a look at the video here: View this post on Instagram Instagram PostOn Monday, June 9, Collin Morikawa was also spotted at Oakmont for a practice round. In a video posted on X by UnderdogGolf, he was captured discussing with his caddie, Joe Greiner, how best to tackle the par-3 eighth hole. He ended up using a driver to hit the shot.Watch the video here:Although the Los Angeles-born golfer has yet to lift the US Open trophy, he has performed spectacularly in the tournament in the past. In 2021, he competed at the 121st US Open at Torrey Pines and tied for fourth place with Brooks Koepka and Guido Migliozzi. He scored 2-under 282, four strokes behind Jon Rahm, who won with a score of 6-under 278.How did Collin Morikawa perform in the US Open last year?Collin Morikawa plays in the final round of the 2024 US Open at Pinehurst Resort - Image Source: ImagnIn 2024, Collin Morikawa put up a good performance in the US Open at Pinehurst Resort, finishing in the top-20. On day one, he shot five birdies, one bogey, and two double bogeys to card 70 at the end of his round.On the tournament’s second day, the 28-year-old golfer shot only one birdie and five bogeys across 18 holes to card 74. He picked up the pace on moving day and had a bogey-free round with four birdies. He carded 66 at the end of his round and charged up the leaderboard.During his final round, Morikawa struggled with four bogeys on the front nine and two on the back nine. He shot four birdies in the round and carded 72, which brought his total to 2-over 282.Morikawa tied for 14th position with Thomas Detry and landed eight strokes behind Bryson DeChambeau, who won with 6-under 274. World No. 1 Rory McIlroy finished in second place with a 5-under 275 score.