Champions League winners Barcelona complained to UEFA on Sunday over the shabby treatment of their 5,000-strong army of supporters flying back to Spain after the 3-1 defeat of Juventus in Berlin.

"Barcelona have lodged a formal protest to UEFA to denounce the lack of respect of pre-arranged conditions for the departure of supporters by the Berlin authorities," a club statement announced.

Fans were routed to fly out of the German capital by first assembling in a "disused" hangar at Schonefeld airport which was supposed to be "fitted out" for the occasion.

But the fans who made their way to the site between 0100 and 0500 local time found the hangar devoid of any seating and without running water, an AFP journalist reported.

Barcelona claim the Berlin authorities failed to provide "minimum services", with the club also pointing to the lack of coaches to bring fans to planes leading to major hold-ups.

They also pointed to insufficient flight information and inadequate facilities for passengers with psychical disabilities.

Luis Suarez and Neymar scored second-half goals to give Barcelona a 3-1 Champions League final victory over Juventus on Saturday as the Spaniards became the first team to twice win the European treble.