"When we conceded, we became confused on the pitch. I have to be honest - [it was the] worst game of (the) season. "Today's defeat was not an accident, we deserved to lose.
In the second half, Lacazette gifted the Gunners the lead, slamming home from 25 yards to make it 2-1. Aaron Ramsey extended Arsenal's lead in the 67th minute with a delightful finish.
Mauro Icardi and Matias Vecino emerged match heroes for the Italian stalwarts as the duo combined superbly to hand Inter a deserved 2-1 victory over the EPL side.
The Red looked set to drop at least two points at home to Newcastle after new £60m striker Alexander Isak put thevisitors ahead shortly before half-time.
John Fleck missed a glorious chance to make it 2-0, which proved costly as Ole Gunnar Solskjaer's side dominated thereafter against the winless Blades.
The highlight of the game for thevisitors was the performance of debutant goalkeeper Dan Bentley, though it's possible Jose Sa will be back between the sticks after falling out of favour.
The Poland international scored the Bavarians' fourth goal in their 4-2 victory at the BayArena to increase his tally in a single season to 44 goals - his personal best.
Goals from Michael Olise (2), Jean-Philippe Mateta and Tyrick Mitchell put the Reds to the sword. The challenge for United is to now bounce back at the first available opportunity in what is their penultimate home game of theseason.
The2-time New Zealand footballer of the year had his latest header in the match day 30 encounter with Crystal Palace. This time, he was able to rescue a point for Nuno Espírito Santo boys.