Jose Mourinho told BT Sports after the Olympiacos match that he would apologise to Eric Dier for first half substitution.
Spurs were 0-2 down after just 19 minutes. Mourinho quickly reacted to the situation and substituted Dier with Christian Eriksen.
Tottenham eventually produced a comeback to beat Greek side 4-2 due to Harry Kane’s double and goals from Dele Alli and Serge Aurier.
“The first thing I want to say is to do publicly what I did in the dressing room which is to apologise to Eric Dier,” Mourinho said.
“It’s never easy for a player but I did it for the team. It was not for Eric playing badly, it was for the team to have different solutions.
“I needed a second man with Dele Alli to come into the pockets, to make a connection and for that I just needed just one midfield player, so it was between Dier and Winks. Before that I thought to bring him to the center of the defence and take away one of the center backs. It was a hard decision, but it’s about the team it’s not about individuals.
“The most important thing is done, we qualify for the next round. That was hard and they are a good team.“