Rangers say only the "mutual respect of both sets of fans" prevented more severe problems from occurring when the Europa League final was staged in Seville this month.
Eintracht Frankfurt were crowned champions when they beat the Glasgow giants 5-4 on penalties at Estadio Ramon Sanchez-Pizjuan on May 18.
Representatives of Rangers, the Bundesliga club and Football Supporters Europe (FSE) met last Friday to debrief and discuss "several significant organisational issues" during the final.
Rangers on Monday stated that fans were not treated with the respect and dignity that they should have been.
"Supporters Europe (FSE) met to debrief and discuss several significant organisational issues during the recent UEFA Europa League final in Sevilla," a club statement said.
"These issues could easily have led to even more severe problems on the night and it was only thanks to the calmness and mutual respect of both sets of fans towards each other that there were not more severe injuries suffered. All three parties applaud the remarkable calmness of the two fan bases, given the situation they faced.
"Apart from the severe lack of food and – even more critically in the soaring temperatures – of water, there were several organisational problems around policing, body searches and beyond. Both clubs, as well as FSE, received a huge amount of complaints and witness statements from fans present in the stadium.
"All three parties will now work jointly to report back to UEFA and the local public authorities in Spain, and will make recommendations to ensure these problems can never occur again at a European final.
"Fans spend a lot of effort, time and money following their teams all over Europe and expect to be treated with respect and dignity while attending football games. This expectation was not met at all at the Europa League final in Sevilla."
UEFA have come in for criticism following chaotic scenes outside the Stade de France ahead of the Champions League final between Real Madrid and Liverpool on Saturday.
Clement wants ruthless Rangers after nervy win over Hearts
Rangers boss Philippe Clement called on his team to show greater ruthlessness after they were made to work for a 1-0 win over Hearts in the Scottish Premiership on Sunday.
Cyriel Dessers put the Gers ahead after just six minutes at Ibrox, diverting James Tavernier's effort past visiting goalkeeper Craig Gordon.
However, Clement's team failed to build on that quick start and inched over the line amid a tense atmosphere, moving back to within nine points of pacesetters Celtic and Aberdeen.
Speaking after the game, Clement acknowledged his players are fatigued after a gruelling run of fixtures but added they must start taking their chances.
"We made too many wrong choices with the ball and became too sloppy," Clement said.
"It's the end of a very busy period, though, with a lot of travelling and they're all human beings, not robots.
"We missed scoring the second goal and we know that until you get that goal the other team stays in the game, so I want us to kill the belief of the opponent faster.
"I'm very satisfied with the result and the deserved three points. We didn't show the same quality in the second half and we didn't finish off the game. We had a few chances, but it stays nervous until the last second."
Rangers host Dundee United after the international break, while Celtic visit Hearts and Aberdeen travel to St. Mirren.
Clement explains Tavernier omission in Rangers draw with Olympiacos
Philippe Clement explained captain James Tavernier was omitted from Rangers' 1-1 Europa League draw with Olympiacos due to fear of him playing too many games.
The 33-year-old skipper was utilised as a second-half substitute in a game where Cyriel Dessers cancelled out Ayoub El Kaabi's opener at the Karaiskakis Stadium on Thursday.
It was a call that raised a few eyebrows given the criticism Tavernier has faced this season, but Clement said it was just about managing the experienced full-back's minutes.
In quotes reported by BBC Sport, Clement said: "That's never an easy decision, but I want more than one captain in the group.
"If you come at a certain age you can't play 60 games at the same level. We knew that before the season. It's about competition for spots.
"It's about one team, winning together. That's Rangers - one team, one family, going for one goal."
Rangers now have seven points from four games in Europe's secondary competition, sitting just outside the top eight in the table.
Clement, however, was disappointed not to travel home with the win despite being impressed with the performance.
"A very strong performance as a team, sticking to the plan, being very disciplined and using the spaces," he added.
"Disappointed we didn't win the game, that's the next step we need to take. But I saw a lot of positive things and I need to praise the whole team for that.
"I don't want players happy with a point. We went for the three points and that's the mentality I want to see against any opponent.
"Our midfield was massive today. Our defence was really solid. Jack [Butland] didn't have to make many saves."
Rangers are now unbeaten in their last five away matches in the Europa League (W2 D3), equalling their longest such run in the competition’s history (also five unbeaten between October 2020 – March 2021).
Up next in the competition is Ligue 1 side Nice, who drew 2-2 with Enschede on Thursday.
Olympiacos 1-1 Rangers: Dessers leveller rescues valuable away point
Cyriel Dessers earned Rangers a priceless point at the home of the Europa Conference League winners, with his strike securing a 1-1 draw with Olympiacos.
The result left Rangers just outside the top eight in the Europa League table, while Olympiacos are one place further back, having picked up seven points from their four games.
Dessers, however, squandered a golden opportunity in the 11th minute after being sent through on goal, but could only fire his effort at the legs of Konstantinos Tzolakis.
Tzolakis was again on hand to deny the Rangers striker six minutes later, producing a stunning save to tip his effort wide as the Scottish side ended the half in the ascendency.
But their good work was undone shortly after the restart when Chiquinho's smart backwards header found Ayoub El Kaabi, who swivelled and rifled the ball into the roof of the net.
However, Rangers responded eight minutes later, with Dessers finally getting the better of Tzolakis. The Nigerian skipped beyond the challenge of Panagiotis Retsos before curling the ball home.
Both sides pushed to try and find the winning goal in the closing stages, but the spoils were shared at the Stadio Georgios Karaiskaki.
Data Debrief: Oh I do love playing away
Rangers can leave Greece happy with a point, though could have returned to Ibrox with all three after a strong showing against Olympiacos.
They ended the contest with an expected goals (xG) total of 1.13 compared to their opponents' 0.68, despite having three less shots throughout the contest.
But their impressive form away from home in Europe continued. They are now unbeaten in their last five away matches in the Europa League (W2 D3), equalling their longest such run in the competition’s history (also five unbeaten between October 2020 – March 2021).
Dessers also impressed for Philippe Clement's side. He has been directly involved in 10 goals across 13 away appearances in major European competitions (eight goals, two assists).
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