Nottingham Forest were beaten 1-0 by fellow Evangelos Marinakis-owned side Olympiacos in their penultimate friendly of the winter break
The visitors saw plenty of the ball in the opening half hour, and they had a couple of good chances to take the lead, too.
Willy Boly had to make a last-ditch tackle to thwart Pep Biel early on, but Ryan Yates spurned a good opportunity to bag the opener soon after, firing narrowly over from the edge of the area after Morgan Gibbs-White had pulled the ball back.