Victory was yet another illustration of Raducanu’s improved resilience.
Raducanu has previously been accused of not showing enough determination to get through matches where she is not feeling 100% physically.
Before the tournament the former world number 10 also described how she had felt pressured by previous coaches into playing when she knew she was not right.
Raducanu suffered a back spasm in Strasbourg last week, needing treatment in the form of dry needling and heat therapy to aid her recovery.
While this issue was not enough to prevent her facing Wang, it was clear from the start Raducanu had some sort of problem.
At the first changeover she looked anxiously towards her team of Jane O’Donoghue and Tom Welsh, who were providing support with main coach Mark Petchey having work commitments in his other role as a commentator.
After eating a banana to raise her energy, Raducanu still looked a little dazed before asking for the doctor.
The carbohydrate intake initially seemed to provide a boost, but the issue continued to bother her and led to the medical attention.
Raducanu can now focus on how to cause a shock against four-time French Open champion Swiatek, who cruised past Slovakia’s Rebecca Sramkova 6-3 6-3.
Fellow Britons Katie Boulter and Jodie Burrage will aim to join Raducanu in the second round when they play later on Monday.
