England midfielder Jack Wilshere caused some concern when he pulled up with an ankle injury towards the end of the first half when he chased a through ball into the Dortmund penalty area.
Wilshere, though, felt he would be okay for the weekend's Premier League game at Crystal Palace.
He said: "I jarred it when I was going through (on goal).
"My ankle stopped and my body went over it and I jarred it a little bit.
"For five or 10 minutes it was painful, then I ran it off, but it made sense to put ice on it.
"I've done that before, even before I had surgery. It is just one of those things.
"Obviously I will have treatment tomorrow because it is still a bit swollen, but I should be all right for the weekend."