Youssef El-Arabi scored a goal as Olympiacos bowed to a 3-2 loss against Bayern Munich.
The 32-year-old found the target with his header in the 23rd minute to put Pedro Martins' side ahead of their visitors in Tuesday's Uefa Champions League fixture.
The goal was El-Arabi's fifth across all competitions this season, including his four efforts in the Greek Super League.
The lead was, however, cancelled out by Robert Lewandowski, who inspired Bayern Munich's fight-back with an equaliser in the 34th minute before scoring his second goal of the night two minutes after the hour-mark.