Arsenal made it nine wins in a row in all competitions in emphatic fashion with a stylish display in a 5-1 victory at Fulham.
Fulham started brightly but were caught on the counter by Arsenal, with Lacazette finishing superbly in the 29th minute to break the deadlock, before Andre Schurrle levelled things up on the stroke of half-time.
The in-form Lacazette restored Arsenal's lead four minutes into the second half, before Ramsey nonchalantly finished off a flowing move to add a third in the 67th minute, 38 seconds after coming off the bench.
Pierre-Emerick Aubameyang then got in on the act 11 minutes from time to add a fourth, before he completed the rout in stoppage time as Arsenal moved level on points with Tottenham, while Fulham sit just above the relegation zone in 17th after a second successive league defeat.
Arsenal were sloppy in the opening exchanges, and gifted Fulham the first chance of the match, but Bernd Leno denied Luciano Vietto with a smart stop.
The visitors grew into the match, and soon got themselves in front through Lacazette. Alex Iwobi fed Nacho Monreal down the left flank, Monreal was afforded far too much time to pick out his man, he fed Lacazette, whose brilliant first touch took him away from his marker before firing home.
Fulham responded well but were wasteful in front of goal until Schurrle stepped up with another fine finish. Vietto's through pass was perfect, Schurrle still had plenty to do, but expertly lofted the ball over the onrushing Leno to restore parity.