Real Madrid fans were not happy with Thibaut Courtois in the first half of their Champions League group stage opener away to Paris Saint-Germain.
The Belgian goalkeeper left Stamford Bridge in 2018 to move to the Santiago Bernabeu, but has so far not lived up to expectations with the Spanish giants.
The 27-year-old has come under criticism from fans and the media in Spain after a disappointing start to his La Liga career, and again was the source of fans' ire following his part in the opening goal for the French side.
PSG left-back Juan Bernat raced down the wing before firing in a low cross which former Real Madrid and Manchester United star Angel di Maria rushed onto, hitting a first-time shot past the keeper at his near post.
The fans weren't happy as they went a goal down, and were even less pleased when Courtois was beaten again by Di Maria from the edge of the box before half-time.
Zinedine Zidane sanctioned the sale of Keylor Navas to the French champions in the summer, and seeing him line up in the opposition area was a stark reminder for Real fans of what they were missing.
And Chelsea fans were not exactly feeling too bad about the situation, given the way the keeper forced through his move to Spain.
