Arsenal closed the gap to Chelsea to three points with a 2-0 victory against Chelsea.
The Frenchman netted the first goal as the Gunners won 2-0 at the Emirates Stadium.
And speaking after the game, Lacazette sent a strong message to Arsenal's rivals for a top-four spot.
"[We are now] Three points to Chelsea, we are still in the race and we will fight until the end," he told BT Sport.
"It is what the coach asked us for. We fight all the game."
"It was not easy for us."