Is the old Zheng Qinwen back — or is she getting even better?

Sideline Story breaks down Zheng Qinwen’s extraordinary US Open run—two comeback wins from 5-0 down, including a deciding-set thriller against Madison Keys—after an injury-hit season and a run through qualifying. We analyze her upgraded technical toolbox and the point-by-point mentality that powered her deep in New York. Then: Carlos Alcaraz’s US Open exit shows some rust after a months-long layoff, and Novak Djokovic’s first-round physical collapse raises hard questions about his best-of-five future.