Heung Min-Son did not provide the spark from the bench Tottenham wanted as they lost to Newcastle.
He was brought on with Spurs 1-0 up and tiring, with head coach Mauricio Pochettino hoping the South Korean could provide a spark for his side.
It failed to happen, and it was Newcastle who went on to win the game, pulling off a surprise 2-1 victory.
Son appeared jaded, not his usual self, and he is one player who could have been feeling the effects of playing all 90 minutes against Monaco on Thursday in the Europa League.
He had two shots on goal during his 23 minutes on the pitch, with neither effort landing on target, and touched the ball 17 times.
This led to him making only four completed passes in the final third of the pitch, where he had been hoping to make an impact.
Against Monaco he was far brighter, providing two assists in the 4-1 win.
Pochettino has got plenty right this season, but he should be asking himself whether his management of Son over the last three games has been wise.
He was a substitute for the final 25 minutes against West Brom last week - in which he made only seven final third passes - and played even fewer minutes this time around.
Given that he featured for all 90 against Monaco in a game where Spurs had already clinched Europa League qualification, it is fair to suggest that they would have been better off starting their most expensive summer signing in a match with more at stake in the Premier League.