Wiktorowski guided Iga Swiatek to four Grand Slam titles during a three-year stint and now hopes to steer another former world number one to further glory.
Osaka, who enjoyed a run to the National Bank Open final before heading to Flushing Meadows, has won four Grand Slam titles herself.
The 27-year-old won the US Open in 2018 and 2020, and the Australian Open in 2019 and 2021, and is now hoping to win her first major as a mother.
Osaka, who lit the Olympic cauldron at Tokyo 2020, has already beaten Coco Gauff at this year’s US Open and overcame Karolina Muchova to reach the last four.
“What I want to take away from this tournament is just smiling and having fun,” Osaka added.
“I know in my first round I was too nervous to smile and in my second-round match I was just really not smiley at all.
“Going into the [Gauff] match, I just wanted to be grateful. I have the most fun when I play against the best players.”
AloJapan.com