[Warning: This article contains language and a picture containing words which some readers may find offensive]

For the second consecutive night, fans attending a UEFA European cup tournament have marred the outcome of a match.

Last night in Rome, during the second half of AS Roma’s Champions League match with CSKA Moscow, travelling supporters attacked stewards and threw lit fireworks into the Roma section. The crowd violence led to the intervention of Italian riot police and eventually to the arrests of five Russian fans.

In all, thirteen stewards needed medical treatment for injuries and one police officer was left with a broken jaw.

There were also reports of two injured CSKA Moscow fans prior to the match, after the supporters broke through a security barrier to confront Roma’s ‘Ultras’.

The fan violence took some of the shine off of AS Roma’s 5-1 victory over the Russian champions.

Tonight in Serbia, an anit-Semitic banner was unveiled at the goalless draw between Partizan Belgrade and Tottenham Hotspur during the clubs’ Europa League Group C encounter.

The sign read: ‘Only Jews and Pussies’ – which alluded to the British television comedy, Only Fools and Horses.

UEFA officials were made aware of the banner before halftime, but no effort was made to take it down.

There has been a perception around football that Spurs have a large Jewish following, which in the past has led to the club being targeted by malicious chants and signage.

For a long time, a section of Tottenham supporters have embraced this perception and responded by referring to themselves as the ‘Yid Army’. Those fans maintain that the word is used “affectionately”, despite its offensive connotations – it is understood that the word was started by racists in Nazi Germany.

The use of the Y-word has continued to be a topic of debate around the North London club.

Tottenham Hotspur are expected to make an official complaint to the governing body within the next 48 hours regarding the anti-Semitic banner displayed inside the Partizan Stadium.

Spurs manager Mauricio Pochettino branded the banner ‘unacceptable’ and ‘disrespectful’.

“I didn’t see [the banner] but the club is aware. It is very disrespectful. It is a shame as it was a great atmosphere. It is very disrespectful, unacceptable and a massive problem for us,” the Argentinian boss said following Spurs’ Group C match.

Prior to the match, Pochettino caused a stir when it was learned that he was leaving left-back Danny Rose out of Spurs’ travelling squad.

It was being reported that the manager was attempting to spare Rose an uncomfortable return to Serbia, since two years ago he was the target of racist abuse in that country while playing for England’s Under-21s.

Pochettino denied those claims made by the press.

Partizan Belgrade have been sanctions before. The club were fined and kicked out of the same competition – when it was the UEFA Cup – in 2007 after crowd disruptions stained their first round qualifying tie at Bosnia’s Zrinjski Mostar.

If the Serbian side are found guilty by UEFA, they could have their home ground partially shut down during future European cup matches.

Partizan coach, Marko Nikolic, was unaware of the issue surrounding the anti-Semitic banner during his post-match press conference. “I want to congratulate the crowd,” Nikolic said. “The support was great and not only great but everything went well. It was a wonderful sporting environment without the slightest problem.”