Dortmund were unlucky not to take all three points from the match, with Joe Hart saving the home side on a number of occasions.
"We don't need to fear anybody; we still have a great chance to get through although we're very disappointed we got just one point," UEFA.com quotes Weidenfeller as saying.
"We deserved to get the three points and [conceding] at the end was a blow we didn't deserve. Hart has saved his team two points and I congratulate him on his performance."
Dortmund are three points ahead of City in second place in Group D.