The match itself was played in a febrile atmosphere, with Chelsea having led for much of the contest before being turned over late on. After the Blues took the lead, Villa manager Unai Emery made changes from the bench that altered the flow of the game and increased the intensity around both technical areas.
Ollie Watkins, introduced as a substitute, scored twice in the second half to complete the turnaround. His second goal, an 84th-minute header, triggered wild celebrations among Villa’s substitutes and coaching staff, directly in front of the home supporters and dugouts.
Those celebrations, combined with the frustration of a damaging home defeat for Chelsea, created a volatile environment. It was in those moments, just after the whistle, that the bottle was thrown, escalating tensions and prompting immediate scrutiny from both clubs and officials.