West Ham took a 2-0 lead through Jarrod Bowen and Crysencio Summerville, exposing Alejandro Garnacho's shaky defending that drew pundit Gary Neville's halftime criticism and fan backlash. New Chelsea boss Liam Rosenior sparked the turnaround with subs, as João Pedro pulled one back on 57 minutes and Marc Cucurella equalized at 70. Jean-Clair Todibo briefly restored West Ham's lead in stoppage time amid a throat-grabbing brawl, but Enzo Fernández tapped in the 3-2 winner from Pedro's pullback—Chelsea's first-ever Premier League rally from a two-goal halftime deficit.