Efrain Juarez scored his second competitive goal for Celtic against Utrecht
Celtic boosted their chances of reaching the group stages of the Europa League with a home win against Utrecht.
Mexico midfielder Efrain Juarez gave the hosts a 19th-minute lead with a powerful strike after good work by Georgios Samaras.
The Greece international then doubled Celtic's tally in the 34th minute with a fine close-range strike.
Lukasz Zaluska tipped over a notable second-half effort from Utrecht's Edouard Duplan, but Celtic held firm.
Daniel Majstorovic made his Celtic debut in place of the suspended Jos Hooiveld to partner Glenn Loovens in the heart of defence.
Paddy McCourt, who suffered whiplash during the celebrations which followed his winner at Inverness at the weekend, spent the evening on the bench.
In the opening minutes, Scott Brown pounced on a Marc Antoine-Fortune cross, but sent it wide of the mark as Celtic kicked off the match with a fiery intent.
Moments later, Utrecht's Jan Wuytens produced a volleyed right-footed shot from deep inside the Celtic penalty area that swerved wide of Zaluska's right-hand post, then Jacob Mulenga headed over the crossbar from six yards.
Maloney tried to guide a mis-kicked effort into the back of the Utrecht net from three yards out in the 14th minute, but the ball was cleared off the line by keeper Michel Vorm.
The deadlock was broken in the 19th minute when Samaras neatly dummied a pass from Beram Kayal and Juarez lifted the ball over the top of Vorm into the back of the net.
Almost immediately, former Celtic man Jacob Lensky tried to reply with a headed effort, but the ball drifted wide, then Kayal blasted in a shot on goal but missed the target.
Shortly after the half hour mark, Celtic doubled their tally when Samaras fired low into the back of the net after good build-up play from Cha Du-Ri.
As the interval approached, Utrecht defender Tim Cornelisse blasted in a hopeful shot from a short corner that sailed wildly over the bar.
Immediately after the break, Maloney sent in a free-kick from far out on the right after Fortune was felled on the edge of the Utrecht penalty area, but the dead ball failed to threaten Vorm.
The match lost some of its earlier pace in the opening stages of the second half as Utrecht battled to keep the score respectable, but on the hour mark Michael Silberbaur sent in a searching ball to the back post and Duplan shot for goal, but Zaluska reacted swiftly to tip it over.
With 12 minutes remaining, Juarez latched on to a loose ball on the edge of the Utrecht penalty area and volleyed in a shot from distance that curved past the left-hand post.
Late in the match, Mihai Nesu sent the ball over the Celtic bar as Utrecht went in search of a crucial away goal that failed to materialise.
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