Tottenham Hotspur manager Andre Villas-Boas has refused to dwell on offensive chanting that was heard during Sunday's 3-1 win over West Ham United at White Hart Lane.
Sections of West Ham's support directed anti-Semitic abuse at the home fans based on Thursday's events in Rome that saw one Spurs supporter stabbed.
"I prefer not to mar the performance with a situation like this," Villas-Boas said.
"You know the animosity there is between Tottenham and West Ham and as long as it doesn't reach stupidity it is a great, great rivalry of two London clubs.
"It would be extremely unfair for me to mar the performance of the players but understanding that a couple of situations are avoidable but we can't decipher the true meaning of what they were saying."
Jermain Defoe grabbed a brace, while Gareth Bale was also on the scoresheet as Tottenham moved up to seventh place in the Premier League table.
Germany
Switzerland
Hungary
Scotland
Spain
Italy
Croatia
Albania
England
Denmark
Slovenia
Serbia
Austria
France
Netherlands
Poland
Romania
Belgium
Slovakia
Ukraine
Portugal
Turkey
Georgia
Czech Republic