Manchester United and Paris Saint-Germain have been charged by UEFA for incidents during Tuesday's last-16 first leg at Old Trafford.
United face two charges after their supporters were accused of blocking stairways and throwing objects during the game, which ended 2-0 to PSG.
Meanwhile, PSG has been hit by four different counts with the travelling fans alleged to have set off fireworks, thrown objects and committed acts of damage along with other crowd disturbances.
Former United winger Angel Di Maria had a bottle thrown at him during the match on his first return to Old Trafford since leaving for PSG in 2015.
Sky Sports News has been told around 800 seats were damaged in the away end, while the netting that protects the disabled fans in front of the away section was ripped off.
PSG's fans are said to have smuggled flares into the ground with one fan understood to have suffered hand injuries as a result of the pyrotechnics.
United have been charged with throwing objects and blocking stairways, PSG with throwing objects, setting off fireworks, acts of damage and crowd disturbance.
A beer bottle was thrown from the crowd towards PSG's former United winger Angel Di Maria in the second half of the last-16 first leg, with the Argentinian responding by picking it up and seemingly pretending to take a swig from it.
It has been reported that a bottle of water was subsequently thrown Di Maria's way as well, and an item landed at the feet of United full-back Luke Shaw in the first half of the game, which the visitors won 2-0.
The case will be dealt with by the UEFA Control, Ethics and Disciplinary Body on February 28.
Disciplinary issues were not limited to the stands, United midfielder Paul Pogba was sent off in the closing moments for a second bookable offence and will miss the second leg in March at the Parc des Princes.
Chief inspector Colette Rose, silver commander for the game, said in a statement released by Greater Manchester Police: "Prior to last night's match, we worked closely with TGM (Transport for Greater Manchester), the local authorities and the clubs to fully assess the appropriate policing response and ensure fans could travel to the stadium and enjoy the game in a safe environment.
To minimize disruption to the general public as fans were arriving, a plan was put in place to signpost people to a number of travel options, including public transport. Broadly speaking, this worked well, although there were some minor delays due to damage caused to some trams. TGM has passed CCTV onto us and this footage will be reviewed.
