The Gunners have the edge in the last-32 tie, with the score draw giving them a priceless ‘away’ goal, despite the game being played in a neutral venue.
But it should have been much better for Mikel Arteta’s side, who missed a hatful of chances against the Portuguese outfit.
Aubameyang was guilty of missing the most gilt-edged opportunity, spurning the chance to score from just a couple of yards after a Hector Bellerin centre.
But that was just one of a number of clear-cut sights of goal that were passed up by the profligate Gunners.
It looked as if those chances would come back to haunt them, when a Pizzi penalty gave Benfica the lead after an Emile Smith Rowe handball .
However, less than two minutes later they had their goal, when Bukayo Saka did what Aubameyang failed to do, in turning home a cross inside the six-yard box.
Shortly after the full-time whistle, the Arsenal captain posted on Twitter : We deserved better and i should Score couple goals today but still one Game to Go we keep going. Well done @BukayoSaka87.”
Aubameyang was coming off the back of his most impressive performance of the season, when he netted a ht-trick against Leeds United in Sunday’s 4-2 win.
But despite failing to register another goal on Thursday, Mikel Arteta was pleased with what he saw from his striker.
“He was at the end of the biggest chances that we had tonight,” the Arsenal boss said. “He was a real threat again that’s why we played him today against this opponent with the line that they proposed all the time.”
He added: “We have some positives to take from the game because we dominated the game and we had patches of really good moments where we created some big chances.
“We weren’t ruthless enough in the opponents’ box and the disappointing thing obviously is the way we concede the goal.”