The Norway global cancelled out Gabriel Jesus's opener and set up Michael Lang for the victor at the Etihad Stadium in the UEFA Champions League last-16 second leg. They have already won the League Cup and are also through to the quarter-finals of the Champions League.
Guardiola's side visit struggling Stoke City on Monday as they seek to mount an immediate response to Wednesday's surprise, albeit inconsequential, Champions League loss to Basel.
Manchester City's Fernandinho, Raheem Sterling and Fabian Delph are recovering well from their injuries and face fitness tests to determine if they will be available for Monday's Premier League game at Stoke City, manager Pep Guardiola said.
Pep Guardiola could clinch his first league title that day and the problem between the two clubs comes after United denied a City film crew access to the Old Trafford tunnel earlier in the season.
'I know everyone wants to anticipate the situation, everyone is thinking about when we will win the title.
"Pep Guardiola came to me after the match and said I did a good job".More news: Sam Nunberg Says He'll Cooperate With Mueller. But What Does He Know?
"It's nothing to do with Wigan - the reason we lost there was that for 50 minutes it was 10 v 11 and we were not precise enough to find a goal", Guardiola said.
"You have to be focused because Stoke away is always complicated".
"We have training sessions to decide before (the game)".
"The players are off today so I do not know the exact situation".
Arsenal are well aware of Elyounoussi after coming up against him twice in the Champions League group stage last season and they have continued to keep tabs on his progress. We wanted to win and see it through that way.
The City manager's deal runs out at the end of next season and he has repeatedly refused to discuss in public whether he will extend it.
However, Guardiola, who won the Champions League twice in a glorious four-year spell at Barcelona, believes the experience of the two Spanish giants in Europe's premier club competition gives them an upper hand.