Celtic boss Ronny Deila is hoping his side can get an away goal next week to all but finish their tie with Qarabag.
Dedryck Boyata's late headed goal gave Deila's side a 1-0 lead to take over to Azerbaijan in the Champions League third qualifying round.
"We have to get one goal and then they need three," he said. "We have to play a top match to get through."
"I'm happy that we got a clean sheet and got a goal - it was very important into the next leg."
The Scottish champions were frustrated by their visitors for much of the first leg in Glasgow but finally found a way through when substitute Kris Commons' corner was met by Belgian defender Boyata.
"Defensively we were excellent," Deila said. "In the last third of the pitch we didn't get enough crosses but we got enough to get one goal and I'm happy with that.
"One-zero is a very good result.
"That's one of the best teams that's been here since I've been here.
"It's going to be a totally different game [in Baku] and they have to go forward to score goals and we'll be [playing] more on breaks and we have speed up front.
"You can see they've had the same coach [Gurban Gurbanov] for seven years. They build, play the same way and in the end, they play with confidence, they rely on their system and you can see they're a good team."
Nadir Ciftci again started in attack ahead of Leigh Griffiths for Celtic before the latter came on in place of Nir Bitton as Celtic chased a goal.
Ciftci subsequently made way for midfielder Commons, having missed a couple of decent chances for the hosts.
However, Deila praised Ciftci's "great attitude" and said of his two principle strikers: "Those two can be used in different ways and can also play together so I'm delighted at having both of them."