That comes on Friday night at the London Stadium, and this was sufficiently damaging to West Ham as a team and as a club for manager Graham Potter — 90 minutes into the season — to be asked about “bouncing back”, if an immediate response is required against their London rivals. Even the club’s media asked him. It’s how bad this felt by 5pm.

Sunderland begin their first Premier League campaign since 2017 at home to a West Ham United side hoping to improve following a mixed a start under Graham Potter. BBC Sport takes a look at some of the key themes before the opener.