Celtic surrendered four goals unanswered as they dropped their second straight Europa League match against Sparta Praha by a final score of 4-1 in Prague on Thursday.

French centre-back Christopher Julien returned to the starting lineup for Celtic after injury issues kept him out since early September.

Odsonne Edouard scored the visitors’ lone goal after 15 minutes, but Sparta answered with a pair of strikes from David Hancko and Lukas Julis before halftime. The Czech side finally put the game to bed later in the second half as Julis netted his second goal of the match in the 80th minute before Srdan Plavsic made it 4-1 in stoppage time.

As they sit at the bottom of Group H with one point from four matches, Celtic will conclude the group stage of this season’s Europa League with a visit to San Siro to play AC Milan before finishing at home against Lille.

The Hoops will return to Parkhead on Sunday when they host Ross County for their Scottish League Cup second round clash.

Here are four findings from Celtic’s loss to Sparta Praha.