Pep Guardiola maybe the best manager in the Premier League right now and maybe the best in the world too but he doesn't impress everyone. Clearly Bayern Munich doctor Dr Hans-Wilhelm Muller-Wohlfahrt isn't a big fan.
It looks very much like Guardiola will continue his incredible run of success by winning the Premier League this season, after all he only needs two more wins and has eight games to get them.
That will add to the titles already won with both Barcelona and Bayern Munich in what is a stellar management career, so impressive considering it's still a relatively young one.
However in Germany the Spaniard wasn't considered a complete success due to his lack of a Champions League trophy win and he wasn't universally loved in Munich as he might have been.
The doctor will see you now. Image: PA Images
One person who didn't get on with him is Dr Hans-Wilhelm Muller-Wohlfahrt the Bayern medical man quit after Guardiola blamed the medical staff for a Champions League loss. He returned after Pep had quit the Allianz Arena.
Speaking in his book, serialised by Bild, the good doctor ripped into the former Barcelona midfielder and dispelled the idea he's a forward thinking manager, saying:
"Under Pep Guardiola, the climate changed at Bayern Munich, and it became more and more clear that he did not trust me and my team. On the one hand, he was totally uninterested in medical issues, but on the other hand, he demanded that we perform miracles.
"Guardiola was often portrayed in the media as an innovative, if not revolutionary, coach. But at Bayern Munich he turned the clock back tremendously. He even went so far as to turn our medically thought-out, well-rehearsed preparation program on its head before the actual football training.
"I simply could not reach Pep Guardiola with the way I think and work. Even my reports of injured players did not interest him. Whenever I wanted to talk to him, he immediately turned away and walked away.
"I think Pep Guardiola is a person of low self-esteem, who does everything in his power to mislead others. He therefore seems to live in constant fear, not so much in defeat, but much more in the loss of power and authority."
An unhappy Pep during Bayern's loss to Porto. Image: PA Images
Really scathing stuff from the doc.
The issues between Guardiola and his Bayern medical staff came about after a loss in the Champions League against Porto and the manager sending midfielder Thiago for treatment away from the club.
Clearly Muller-Wohlfahrt has never got over it.