He continued to feature regularly in domestic games for Celtic , but was often used as a substitute .
Samaras played in all six group games , but only scored once , away against Barcelona in a 6 -- 1 defeat .
Samaras continued to feature regularly in domestic games for Celtic , but was often used as a substitute .
Samaras played in all six group games , but only scored once , away against Barcelona in a 6 -- 1 defeat .