LONDON -- It took less than 20 minutes for the mask to slip.
After Ruben Semedo crept in behind Toby Alderweireld to score Olympiakos's second goal, Jose Mourinho turned to glare at the Tottenham Hotspur bench with a look that said, "Can you believe this?"
Then he was off, marching down the touchline, furiously clapping his hands together and animatedly urging his sleep-walking players to pick their heads up. Returning to his technical area, he ordered Tanguy Ndombele to warm up. In the 29th minute, he made his first change, sending on Christian Eriksen in place of Eric Dier.