Olympiacos defender Panagiotis Retsos praised Rangers boss Philippe Clement for doing his homework on them after the Ibrox side claimed a draw in the Europa League.
Rangers picked up a good point against the Europa Conference League winners in Athens after an equaliser from striker Cyriel Dessers.
And Greek international star Retsos credited the way the Ibrox men set themselves up against them.
He said: "It seems like Rangers had studied us closely because they were very good at shutting down our attacking qualities so credit to their coach for that.
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"And I can understand that because of the performances we put in last season when we won the Europa Conference League. If I were them, I would have wanted us to be cautious too.
"But it wasn't the result we wanted. When we play here, we play to win and we have done that consistently recently.
"We conceded a goal from individual errors that we shouldn't have conceded. They happen in football. We have to work on them.
"I'm not happy. We wanted the three points because it would have been a big advantage for us."
