Kris Commons scored the only goal as Celtic beat Dinamo Zagreb 1-0 at Parkhead in the Europa League on Thursday night.
Commons struck after just six minutes and Craig Gordon made some important saves in an open and entertaining match as Ronny Deila's men earned an important victory.
Celtic are joint top of Group D along with Salzburg, who beat Astra 2-1. The Romanians, who are yet to pick up a point, are Celtic's opponents on matchday three and four, with the first game in Glasgow on October 23 and the return on November 6.