Barcelona were held to a weak, goalless draw against Galatasaray in the first leg of their round-of-16 match at the Camp Nou on Thursday.
Xavi Hernández's side advanced to the last-16 with a decisive 4–2 win over Napoli in the second leg of their playoff round - part of an eight-game unbeaten run for the Catalans - to take a 5–3 aggregate victory. .
Despite the Turkish Super Liga side dominating the first half, Barcelona had no success and the score remained 0–0 at the break.
Barca rained shots on Galatasaray with 14 goal attempts, against only three from the visitors, who were indebted to several fine defenses from 23-year-old Spanish goalkeeper Iaki Pea.
Galatasaray also created good chances with winger Kerem Akturkoglu who was a constant threat to Barca's defense with his range of speed and skill.
Ousmane Dembele skidded a powerful shot from distance over the bar as the second half was over and Frankie de Jong hit the post shortly after Barcelona demanded an elusive opener in the match.
Galatasaray took the lead against the running of the game through Bafetimbi Gomis in the 78th minute, but the linesman's flag went up for offside and the goal was denied.
The two teams will meet again in Turkey on March 17 for a place in the deciding second leg and the semi-finals.