Van Bronckhorst expressed his pride at the result, but was keen to stress the tie is only at the halfway stage.

"It is a great night, but only a great night," the Dutchman said post-match.

Van Bronckhorst added: "We are not through to the next round, which is what we want. We know we have to have a good performance next week as well."

Rangers started aggressively, but were composed in possession against a Dortmund side currently second in Germany's top flight, just six points off leaders Bayern Munich.

The Ibrox boss highlighted "the benefit of having VAR" after a check allowed James Tavernier to open the scoring from the spot.

Alfredo Morelos added a quickfire second with a back-post tap-in before John Lundstram's left-foot drive from the edge of the area had Rangers in dreamland.

England teenager Jude Bellingham replied instantly with a fine curling finish of his own, but Dan-Axel Zagadou's own-goal restored a remarkable three-goal lead.

However, Raphael Guerreiro's dipping strike means Van Bronckhorst's side go into the return leg with a two-goal advantage.

And the Rangers boss said there is still "a lot of work to do" to ensure they go through.

"We wanted to take a result back with us to Glasgow," he added. "I think we achieved that with a two-goal difference.

"There are a lot of positives to take from this game. I thought the boys were exceptional. Every man, even the substitutes who came on, everyone did a fantastic job. But like I say, it is only halfway."