The American will continue her career in 2025 and explained her reasoning in a detailed Instagram post.
"I feel like all of us try to raise our level to play every point in the best possible way," world No. 1 said after reaching Six Kings Slam final.
Former US Open finalist Kei Nishikori has taken a wild card into Vienna.
"The way we manage cases does not change, irrespective of the profile of the player involved," ITIA CEO Karen Moorhouse said.
"I want to say that I'm very excited and looking forward to working with Wim," world No. 1 said.
The Swiss talked about passion for the sport after his win in Stockholm
All but two of the lucky losers are already out.