The first-leg of the Champions League round of 16 tie between Manchester United and Olympiakos will be played in a partially closed stadium in Greece.
Uefa has ordered the closure for “the racist conduct of supporters” during a group stage match at home to Anderlecht on December 10. The fans set-off fireworks and used lasers during the match.
United visit the Greek champions on February 25. Olympiakos were also fined €30,000.
Likewise, Zenit St. Petersburg will also have to close part of their stadium for their home leg against last season losing finalists Borussia Dortmund.
The Russian side have been punished by Uefa for the racist behavior of their fans, who threw fireworks during their 4-1 defeat at Austria Vienna. There were also crowd disturbances during that encounter.