There was tension at the final whistle when Juventus lost to Benfica, as Angel Di Maria seemed to ask Arek Milik why he had been substituted, a decision Max Allegri later explained.
The Poland international had opened the scoring after just four minutes with a glancing header on the Leandro Paredes free kick.
However, Benfica equalised with a penalty on the stroke of half-time and then turned it around completely for a 2-1 victory.
At the final whistle, Di Maria was caught on camera asking Milik why he had been substituted and his teammate seemed to shrug in irritation.
Allegri spoke at a press conference afterwards and was asked about the decision to haul Milik off.
“Angel only had half a training session with the squad and needed playing time to regain fitness. I took Milik off because we were struggling with only two midfielders.
“I had to take a striker off, I took Milik off, who seemed more tired.”