Lionel Messi bagged a hat-trick and Neymar grabbed four assists as Barcelona launched their Champions League campaign in style with a 7-0 thrashing of Celtic on Tuesday.
Messi and Neymar were reunited with Luis Suarez from the start for the first time this season and took no time in getting reacquainted as all three were on the scoresheet.
Two goals from Messi either side of Moussa Dembele`s missed penalty for Celtic gave Barca a comfortable half-time lead.
And there was no let-up for the Scottish champions after the break as Neymar, Messi, Andres Iniesta and a Suarez double completed the rout.
However, Barca could face further sanctions from UEFA after thousands of separatist Catalan flags were again flown at the Camp Nou.
The Spanish champions were fined 150,000 euros ($170,000) by UEFA for the presence of the flags during last season`s competition, 50,000 euros of which was suspended for two years.
Messi had started Saturday`s shock 2-1 defeat to Alaves on the bench due to the after-effects of a minor groin injury, but took just three minutes to make his presence felt with a rising drive into the top corner from Neymar`s lovely through ball.
The five-time World Player of the Year sent another effort inches wide from the edge of the area as Celtic struggled to get out of their own half in the early stages.
However, they had a great chance to level against the run of play when Dembele surged onto Scott Sinclair`s pass and was upended by Marc-Andre ter Stegen.
Dembele was Celtic`s hat-trick hero in a 5-1 thrashing of Glasgow rivals Rangers on Saturday, but he failed to add to his burgeoning reputation as ter Stegen flew to his right to turn the Frenchman`s penalty behind.