Messi at the double to help Barca top group

Defeat for Celtic means that they are out of Europe, with Europa League qualification now not a possibility.

However, the Bhoys produced a much-improved display on their last outing against Barcelona, playing with aggression and intensity.

Depite an improved performance, the Scottish giants had no answer to their Catalan counterparts, who produced a solid performance of their own.

Barcelona took the lead in the 24th minute when Lionel Messi latched onto Neymar's chipped pass, hitting his half-volley first time past Craig Gordon.

Celtic came close to equalising through the in-demand Moussa Dembele, but the striker could only muster up a weak header from James Forrest's cross.

Celtic 'keeper Craig Gordon produced a contender for save of the season, denying Luis Suarez headed effort.

Barcelona then got their second 10 minutes after the break when the away side received a penalty as Emilio Izaguirre brought down Luis Suarez in the penalty area and Messi converted from the spot.