Fraser Forster claims Celtic's 2-0 first-leg lead over Helsingborg is a "dangerous scoreline" going into the return match of their Champions League play-off at Parkhead next Wednesday.
A Kris Commons volley in the second minute and a 75th minute header by Georgios Samaras at the Olympia Stadium put Neil Lennon's men within touching distance of a place in the group stages of the competition for the first time since season 2008/09.
"The players all know the job is only half done," Forster said. "It is important that we finish it off, 2-0 is a dangerous scoreline and so it is important that we keep it tight and hopefully get the first goal next week."
The Hoops had their 24-year-old goalkeeper to thank for the clean sheet as he pulled off a series of fine saves, especially in the first half when the Swedish champions were piling on the pressure.
Lennon claimed Forster's chances of winning an England call-up for the first time could only have been boosted with his performance.
"Away from home in Europe you need your goalkeeper to be strong and he had a fantastic game, he did everything right and we will maybe need more of the same in the home game," he said.
"He's got the talent, the right attitude, a great work ethic and he is improving all the time."
The Northern Irishman was also reluctant to concede his side were as good as through to the group stages.
"There is another game to go so we are not getting too carried away," he said. "To have a two-goal lead and a clean sheet was as good as we could have asked for under the circumstances."
Meanwhile, midfielder Ki Sung-yueng is in talks with Swansea after a fee had been agreed between the two clubs but Lennon said: "I don't know what the situation is at the minute."
- Neil Lennon
- Fraser Forster