And first thing they will get him to do is to take over penalty taking duties, especially after Danny Welbeck had a second half spot kick saved.
Lacazette was promised a run-out and he came on as one of TEN changes in the 68th minute.
The France international immediately looked quick, dangerous and seized his chance to fire home from close range after 83 minutes. He has that wonderful knack of being in the right place at the right time.
Alexandre Lacazette scores on his debut
He looks like the proverbial brick outhouse. But the very impressive thing about the Bosnian defender is that he can play left back, left wing back or left side of a back three.
That is exactly what Arsenal have needed together with a strong mentality, a toughness which will be welcome in the dressing room and is clearly a competitor on the pitch.