But in the second half it was rampant from Arsenal as Lacazette got his second, substitute Aaron Ramsey scored 38 seconds after coming on and Aubameyang rounded off the afternoon with two goals of his from the bench.
Arsenal's previous winnings include Aaron Ramsey goal which came from a stunning team move as Arsenal made it nine wins on the spin across all competitions.
On his potent strike-force, Emery added: "It is one process, to know better after training, after every match, after every decision, how we are better on the pitch, between the players, in our tactical system and impose our timing on the pitch in possession with the ball".
Arsenal won two league titles in Adidas kit in 1989 and 1991, the first secured by Michael Thomas' last-gasp goal at Anfield as Arsenal pipped Liverpool in the final game of the season.
Lacazette joined Arsenal last summer for a then-club record fee before that amount was eclipsed in January as fellow forward Aubameyang came in from Borussia Dortmund.
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"It is good", Lacazette said of his relationship with Gabon worldwide Aubameyang. "We scored many goals, we were compact, we won the game and the fans are happy as well, so it is flawless".
Earlier this month, Ramsey's representatives Avid Sports & Entertainment Group confirmed he is likely to depart as a free agent at the end of the season after the club chose not to continue discussions over a new contract.
"We tried to win the game", he said.
'And it's a massive one as we're on the verge of losing another player that's a good player for Arsenal'.
"I must be anxious when we play bad and lose, I trust we play well and have more options to win the game".