Inter Milan have been fined £132,000 by Uefa and must play their next four European games behind closed doors after crowd trouble against AC Milan.
Inter fans threw missiles on to the San Siro pitch, and Tuesday's Champions League quarter-final second leg tie was stopped with AC Milan leading 1-0.
AC have been awarded a 5-0 aggregate win and go through to the semi-finals where they will meet PSV Eindhoven.
Two games will be added to the ban if Inter reoffend in the next three years.
Inter can appeal against the decision and they have three days to do so.
AC Milan goalkeeper Dida was struck on the shoulder by a missile during the second half of the game as Inter fans protested after having a goal disallowed by referee Markus Merk.
It had been expected that Inter would face much harsher sanctions and the possibility of a ban from European competition had been mooted in some quarters.
But Uefa spokesman William Gaillard defended the level of punishment.
"There will be some people who think it is lenient and some people who think it harsh," Gaillard told BBC Radio Five Live.
"This is the largest fine in Uefa's history. The loss of four home games amounts to seven or eight million euros.
"It is a hefty punishment compared to anything that has been done for over five years.
"This kind of behaviour is clearly not acceptable and if any more trouble occurs it is obvious that they would get something heavier."
In 2001 Inter were ordered to play two European matches away from the San Siro and fined £35,000 after similar crowd trouble at their Uefa Cup tie with Spanish side Alaves.