In the end, though, they were punished by Lacazette's fine 82nd-minute finish.
Fabinho, starting a high-profile Premier League game for the first time, looked particularly rattled, while Trent Alexander-Arnold, at right-back, was clearly targeted by the Gunners and struggled as a result.
But Milner's goal stemmed from one of only a handful of chances Liverpool mustered in the second half.
Arsenal's 13-game unbeaten streak across all competitions will be under a serious threat this weekend when they face off against Jurgen Klopp's Liverpool at home.
He's right. Improvement is nearly certainly still to come from this side, though you could say the fact that Liverpool are disappointed with a point away at Arsenal is indicative of the progress Klopp's team has made.
"They proved a lot of people wrong because they came out and had a real go at Liverpool and I thought they deserved something out of it". It means you bring two players.
DF Sead Kolasinac, 7 - Couldn't have had a tougher assignment in his first league start of the season in going up against Mohamed Salah, but he managed to use his physicality to great effect against the Egyptian without stepping over the line. Formation-wise I was not happy at how compact we were and stuff like that.
Pelosi subpoena risk ‘unlawful,’ Trump says, will take to Supreme Court docket
He didn't single out any of the Democrats who are thought to be considering challenging Trump for the presidency in two years. Trump, Knight and Vice President Mike Pence will be stumping Friday for Republican Mike Braun, who is running against Sen.
MF Alex Iwobi, 7 - Gave Arsenal a spark when he came on and did well to set up Lacazette for the equaliser.
"The reaction of the team was flawless", goalkeeper Bernd Leno told Arsenal's official website afterwards.
Lacazette ran on to a pass from Alex Iwobi in the 82nd minute and held off goalkeeper Alisson, creating enough space to fire a hard shot into the far corner.
Arsenal benefited from a lucky escape in the first half of their Premier League clash against Liverpool as the officials wrongly ruled out Sadio Mane's early goal. Only Manchester City have scored more than the Gunners this term, while the link-up play between the attacking quartet of Lacazette, Aubameyang, Mesut Ozil and Mkhitaryan was breath-taking at times.
Mane appeared to have put the Reds ahead in the 18th minute, but the play was called back offside.
'We wanted to win but the performance is good, we push and we work the match, doing our tactics and with our supporters pushing us with energy, ' he said. Those huge gaps aren't closed over the course of one summer.
But Emery spoke in the build-up to this contest about wanting to write a new history for Arsenal and in this fixture there were signs his players are embracing the new era, which will have been a pleasant birthday treat for their boss.