Tottenham boss Ange Postecoglou says Timo Werner's performance was "not acceptable" after replacing him at half-time in the 1-1 Europa League draw at Rangers.
The German forward, 28, lost possession 16 times, did not win any of his five duels and only completed 69% of his passes.
Former Rangers striker Steven Thompson, covering the game for BBC Sportsound, said at the time: "Timo Werner's final decision on the ball so far has been abysmal.
"I'll be amazed if he's not hooked at half-time."
Werner was indeed replaced before the players came out for the second half by Dejan Kulusevski, who went on to score a 75th-minute Spurs equaliser after Hamza Igamane had given Rangers the lead two minutes into the second half.