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A prior comeback attempt by the player concluded with a mixed doubles loss and an early departure for the "Special Ks" tandem at the Australian Open, where he and partner Thanasi Kokkinakis fell in the opening round to fellow Australians Jason Kubler and Marc Polmans.
After that loss, Kyrgios indicated a need to reassess his upcoming tournament plans. "I've done everything I thought I could do.
I don't know. I don't know what I'm going to do [going forward]," Kyrgios said at the time.
Those remarks sparked widespread speculation regarding the potential end of his professional tennis career.
However, those doubts were answered on the grass courts of Stuttgart, where a strong performance could potentially position the 2022 Wimbledon finalist for a wildcard entry in London.
"I'm so thrilled to be back, and playing some high-level tennis as well," Kyrgios said, adding, "Confident?
I don't know if that is a word I'm feeling quite yet. Obviously, I will see how I feel tomorrow."
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Kyrgios is scheduled to compete next against Japan's Sho Shimabukuro, who holds a ranking of 101, on Thursday, following a doubles appearance alongside partner Alexander Bublik on Wednesday.