"Was defeated" correctly indicates that Djokovic lost to Jannik Sinner, while "rising" is the appropriate word to describe the emerging talent in men's tennis. The other options do not fit the context: "Had defeated" suggests Djokovic won, which is incorrect. "Was defeating" and "arose" are grammatically and contextually incorrect. "Deteriorating" describes something declining, which does not match the idea of new talent emerging. Thus, option 3 is the correct choice.