New South Wales Minister for Trade and Industry Niall Blair (2nd L) holds the FA Cup with Arsenal football players Petr Cech (R) Laurent Koscielny (2nd R), Per Mertesacker (C) and manager Arsene Wenger (L) in front of the Sydney Opera House on July 11, ahead of two pre-season football friendly matches against Sydney FC today and Western Sydney Wanderers on July 15.
Alex Oxlade-Chamberlain and Eddie Nketiah were next to come close, the latter hitting the post from his hooked volley in the final 10 minutes, but the Gunners did have a deserved second late on.
His performance in the latter minutes of the first half was particularly good, as he made a solid double stop from Walcott and Coquelin on 35 minutes, before denying the impressive Willock one-on-one just before half time.
And the Emirates faithful were delighted with his debut goal.
Sydney FC goalkeeper Andrew Redmayne pressed his case for a starting spot this season for the defending A-League champions.
Reports have suggested the Gunners are set to make their third bid for the France international and pay £45m for for the 21-year-old.
After just four minutes on the clock, the captain Mertesacker was on hand to give his team the lead.
"He's a top, top player and I think he'd be a good signing for Liverpool". His shot looked to have been blocked by the arms of defender Sebastian Ryall, but replays showed it had actually hit his back.
Iwobi pulled the ball back and Lacazette was waiting from seven yards out to divert the ball past Redmayne, ensuring that Arsenal are up and running with a convincing win.
But justice was done when Welbeck's penalty was saved by Redmayne down to his right.
The second half of pre-season fixtures can usually end up as drawn out affairs with wholesale changes made to each sides.
According to The Mail, the North Londoners are "confident" that Monaco winger Thomas Lemar will join him at Arsenal in what could be a £45 million deal. "There is a clear plan going forward".