Paris Saint Germain boss Thomas Tuchel has promised to hold an inquest in the wake of his side's shock Champions League defeat to Manchester United.
Tuchel's French champions crashed to a 2-1 loss to United in the Parc des Princes in the opening round of group matches.
Marcus Rashford sealed a famous win for United with an 87th minute strike to make it a perfect return to the competition for Ole Gunnar Solskjaer's heroes.
It was PSG's first home defeat in the group stages since 2004 - and first loss on home soil since United beat them 3-1 in the same competition in March 2019
Tuchel led PSG to the final last season and his side, including superstars Neymar and Kylian Mbappe, went into the showdown with United on the back of five straight wins.
Tuchel insists he won't discuss what went wrong in public - but has vowed to give his French flops a dressing down in private
"We had injured players, but we had trouble finding solutions and the spirit that's necessary in the UEFA Champions League.
"It's clear we can improve - and we must. We're not happy with the performance, but now is not the moment to be too critical in public. We'll do that behind closed doors.
"We played well before this, with five straight wins. It was a performance without intensity, without aggression, without getting the ball back, without counter-pressing. It was a bit bizarre. I don't know why."