Andre Villas-Boas expects UEFA to take action against Inter Milan after their supporters appeared to racially abuse Tottenham players on Thursday night.
"It's a very sensitive situation," Spurs manager Villas-Boas said of the chanting. "UEFA set out to act on that situation.
"It was very, very easy to hear the chanting so I am sure that UEFA will act on it.
"It's difficult for Inter Milan because it is something that in some way has happened before.
"It doesn't mar the game but it is something that should have been avoided."
It has been reported that Tottenham players were tonight subjected to racist chants by Inter Milan supporters, who were also seen waving an inflatable banana.
Spurs lost 4-1 after extra-time on the night but progressed to the Europa League quarter-finals on away goals after the tie finished 4-4 on aggregate.
Monkey chants appeared to be aimed at several Tottenham players, notably goalscorer Emmanuel Adebayor, while a fan was seen with an inflatable banana.
Tottenham Hotspur have confirmed three of their fans suffered "minor injuries" after an attack in a Lyon pub last night.
Around 50 masked thugs attacked the Smoking Dog pub where roughly 150 Spurs fans had gathered on the eve of their Europa League match against the French side.
A Tottenham spokesman said: "Club officials attended an incident last night in Lyon. A group of around 50 people confronted fans. The situation was dealt with and arrests were made within the hour. Three fans sustained minor injuries and received prompt medical assistance.
"Spurs officials and stewards will be in the city throughout the day, along with matchday French police ahead of kick-off."
Israeli footballer Yossi Benayoun, who plays for West Ham on loan from Chelsea, said he was disappointed and embarrassed by chants from his team's supporters yesterday:
Police confirmed that two West Ham supporters were formally cautioned by officers after making "racially-aggravated gestures" during yesterday's match.
The pair of fans were arrested during the game and accepted the police cautions, Scotland Yard said.
One of those was a Hammers season ticket holder who has since been banned.
The Board of Deputies of British Jews said it was "dismayed" by reports of anti-Semitic chanting by West Ham fans.
It said in a statement:
The board said they would be making a complaint to the FA:
West Ham United said the club will take the "strongest possible action" against any supporters found guilty of inappropriate chanting during the Barclays Premier League match away to Tottenham yesterday, including the enforcement of life bans.
A statement said:
UEFA have announced that they have opened proceedings against Lazio for "improper conduct of the club's supporters" during their Europa League match against Tottenham.
Aaron Lennon, Jermain Defoe and Andros Townsend all appeared to be the subject of monkey chants from the away end during Spurs' 0-0 draw against the Italian side.
A statement read: "UEFA has opened disciplinary proceedings against S.S. Lazio for the improper conduct of the club's supporters (racist behaviour) during the UEFA Europa League group stage match on Thursday 20 September between Tottenham Hotspur FC and the Italian side."