Despite struggling with an ankle issue, Alexander Zverev overcame Alexander Bublik in two grueling tie-breaks to advance to the quarter-finals of the Shanghai Masters.
Germany's Alexander Zverev has clinched the year-end ATP world number one ranking for the first time in his career, capping off a remarkable season that included Grand Slam victories in Paris and New York.
Carlos Alcaraz breezed past Juan Manuel Cerundolo in straight sets to begin his Shanghai Masters campaign, while Daniil Medvedev and Felix Auger-Aliassime battled through tight matches.
