Manchester United lost to crisis team Everton on Saturday.
And Arsenal did not want to be better than the rival.
At home, they lost to Brighton 2-1 and thus missed to connect a small grip on the important fourth place, which means a Champions League ticket.
It was Arsenal's second straight loss after losing heavily to Crystal Palace 3-0 in the last round.
Chelsea bounced back
London rival Chelsea fell very surprisingly with 4-1 against Brentford in the last round, and followed up with a loss against Real Madrid at home in the Champions League quarter-final.
But in Saturday's match against Southampton, it was an offensive discharge.
Chelsea won 6-0 and the numbers could have been even bigger if they had taken advantage of all their chances.