United won on Thursday 1-0 against Zorya but Ibrahimovic, who scored the only goal, isn't happy with his team's performance.
He admitted it wasn't an easy game and told 'BT Sport': "We played good and created some chances but it was a difficult game.
"If you don't score early the spaces get smaller and you have to find a way to score. After the goal, we had more space but it was a decent game. We won and that is what counts after losing against Feyenoord [on matchday one]", he admitted.
The Swede added: "We play as a team. We create as a team. We are trying. Sometimes we create a lot and sometimes we create less".