Ibrahimovic scored with a bicycle kick just four minutes into his debut for the former English Premier League (EPL) champions' 5-2 win over Galatasaray in Gothenburg on Saturday.
Rashford burst onto the scene last season, making a huge impact in the EPL, which led to his surprise inclusion in the England squad for Euro 2016.
And the youngster said he expected to learn a great deal from 34-year-old superstar Ibrahimovic.
"We can definitely all learn from him while he is here, so we all need to take that chance," Rashford was quoted as saying by United's official website.
"It's a massive help to be with him every day and it's great to see what he is like on and off the pitch. There is a lot to learn from him and hopefully I can bring some of his game into mine."
Rashford came off the bench at half-time in Sweden and won the penalty which was scored by captain Wayne Rooney and put United 3-2 up.
"It's really important to get that first win together as a group. It's great for us in the build-up to the season. The manager wasn't concerned with United being 2-1 down at the break and just told us to push and close the space, something we did really well in the second half," the England international said.
"There's a lot of optimism, as that is only our second pre-season game as a full squad. It was the first game for some players. It is very exciting for both fans and players," Rashford signed off.
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