Yibing Wu upset pre-match favourite Nick Kyrgios 7–5, 6–3 in the first round of the ATP 250 Stuttgart grass-court event on 13 June 2023. Wu, priced at 3.42 against Kyrgios's 1.36 odds, delivered a composed performance to claim a significant victory on the surface where consistency typically trumps explosive shot-making. The Chinese player's composed approach neutralised Kyrgios's natural attacking instincts across both sets, with Wu establishing control in the opening set before extending his advantage in the second. The result represents a notable scalp for Wu and suggests Kyrgios may require adjustment to his grass-court game following the early exit.