The Tottenham Hotspur boss had been doing so well - but his insistence on starting players that aren't good enough is now costing him.
After starring going forward against Chelsea, Danny Rose was allowed to keep his place in Tottenham's starting XI at Crystal Palace.
It cost them.
Boss Mauricio Pochettino is clearly a fan of rotation and giving every member of his squad a chance. Rose has proved himself fitness-wise and has often shown initiative going forward.
Defensively, however, the Spurs star simply isn't good enough. Ben Davies is a far superior left-back - of that there is no question.
Barely noticeable at Crystal Palace, why Andros Townsend was in Pochettino's starting XI is a real mystery. Townsend scored a penalty against Chelsea - but what did that prove?
He certainly showed spirit and bravery in taking the spot-kick... but there is no doubt the Tottenham winger has offered absolutely nothing on the ball this season. If the 23-year-old isn't dropped soon, questions must be asked of his manager.
A tricky selection, as Ryan Mason and Nabil Bentaleb are first choice in central midfield, anyway. But Benjamin Stambouli's display against Crystal Palace proved he isn't ready for the starting line-up quite yet.
The Tottenham midfielder exerted very little influence alongside Mousa Dembele and, although the penalty he gave away was debatable, Stambouli should have known better than to slide in recklessly in his own danger area. What was he thinking?
As much criticism as Mason and Bentaleb get - they certainly split opinion - they are far more suitable options for Pochettino at Spurs right now.