The sanction comes after supporters of both Atalanta and Inter were found to have introduced and used pyrotechnic devices.
Several clubs were sanctioned for supporter misconduct involving pyrotechnics and thrown objects.
Orlando City appear particularly hard hit with five players sidelined, and Toronto FC’s injury list is one of the longest in the league with six players unavailable.
The series of sanctions follow incidents involving supporter behaviour and team conduct in recent UEFA competitions.
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