With this fixture marked as high-risk, security around the Lluís Companys Stadium had already been tightened, but the arrival of Benfica’s most extreme supporters has escalated tensions further.

UEFA also fined Benfica €35,000 for the lighting of fireworks during last week's game against Barcelona in Lisbon, and handed them the same suspended partial stadium closure as Bayern.

BENFICA supporters clashed with stewards following ... Both sets of supporters clashed outside the stadium before the match. The fixture was deemed high-risk prior to the clash, with Barcelona ...