Ryo Hisatsune caught himself in a golf ball incident at the final round of the Australian Open. The Japanese star faced a penalty on the eighth hole that forced him down the leaderboard and resulted in his worst round of the week.On Sunday, December 7, Ryo Hisatsune entered the Royal Melbourne at 6-under. He started with a bogey on the third and then made a birdie on the seventh. On the par-4 eighth, Hisatsune was short of the green after two shots. Before the third shot, he decided to change the club, and while doing this he dropped one club onto the ball, resulting in pushing it some distance.As per Rule of Golf 9.4b, if the player lifts the ball or moves it, he will get a single-stroke penalty. As a result, Ryo Hisatsune faced a penalty and then proceeded to make a double bogey.The remaining round didn't go great either, as he finished with 6-over 77 that included two bogeys and a triple bogey on the par-4 13th. The 23-year-old finished at even par after 72 holes and dropped 36 spots down to T51.Ryo Hisatsune's performance in 2025 explored?Riyo Hisatsune played 30 events this season and missed a whopping 10 cuts on the PGA Tour. The Japanese golfer could make just four top-ten finishes, with a T4 at the Valspar Championship being his best result. He finished 84th in the FedEx Cup and slipped to 95th in the Fall season.Here's a look at Ryo Hisatsune's performance in the 2025 season:Sony Open in Hawaii: T65The American Express: T43Farmers Insurance Open: Missed CutWM Phoenix Open: Missed CutMexico Open at Vidanta: T10Cognizant Classic: Missed CutTHE PLAYERS Championship: Missed CutValspar Championship: T4Texas Children’s Houston Open: T47Valero Texas Open: T5RBC Heritage: T18Zurich Classic of New Orleans: —THE CJ CUP Byron Nelson: Missed CutONEflight Myrtle Beach Classic: T37PGA Championship: T37Charles Schwab Challenge: T6RBC Canadian Open: T47Rocket Classic: T60John Deere Classic: T60Genesis Scottish Open: Missed CutBarracuda Championship: T473M Open: Missed CutWyndham Championship: Missed CutProcore Championship: T13Sanderson Farms Championship: T48Baycurrent Classic: T72Bank of Utah Championship: Missed CutWorld Wide Technology Championship: T40Butterfield Bermuda Championship: T52The RSM Classic: Missed CutDP World Tour:Nedbank Golf Challenge: T55