It would be so nice if, when making a blanket statement like this, you didn't make things up.
Here, a small excerpt from the research literature on football fatigue and recovery:
1*
"Mental fatigue is an additional factor to consider in the attempt to explain post soccer match fatigue. When the competitive fixture list is congested, there may be insufficient time in between matches for players to recover psychologically, potentially leading to lack of motivation and mental burnout. A congested schedule can be associated with a lot of travelling, which may lead to the disruption of circadian rhythms (jet lag or arrival during the night) and increase the level of stress induced by restricted motion, unfamiliar sleeping patterns and poorer quality of sleep.
In summary, central fatigue seems to be the main cause of the decline in maximal voluntary contraction and sprinting ability, whereas peripheral fatigue seems to be more related to increased muscle soreness and therefore seems very likely linked to muscle damage and inflammation. Post-match fatigue may be associated with glycogen depletion, muscle damage and mental fatigue."
Remember that time a few days ago when Ole was angry that Mason Greenwood was brought to the English nationals instead of being allowed to rest? That wasn't because he needed to chill out from having a sore body.
Our season ended 8 weeks ago. A lot of our players then went on to national team duty. We've had covid-19 disrupting normal patterns and in Pogba's case, actually causing an infection.
I know that you think you are right and no amount of talking will convince you that you're wrong, but you're legitimately suggesting that players recover to 100% fitness after 72 hours, and the research litterature does
not support that statement at all.
In fact, here is the direct quote from the resarchpaper:
2*
"In summary, soccer-related physical performance is impaired immediately after the match and recovers gradually to pre-match levels. Several studies failed to observe a normalisation of physical performance within the 3 days consecutive to a soccer match1,7,11,14, suggesting that performance can be impaired for 72 hours and more. When playing two matches per week, the 3-day recovery time between two successive matches may consequently be insufficient to fully recover. This long-lasting reduction in physical performance testifies the presence of some fatigue processes that recover slowly after the match.
Remember that time after the covid break when the first XI played nearly every game? Yeah. Because we do not have great players after the First XI. VDB certainly helps, McTominay, Fred, Williams to some extent but after that it's just poor, poor, poor or not ready.
Since I know that you'll be both eager to read up to clarify both my statements AND your own: here is the link to the resarch paper I'm quoting, including reference list in the bottom:
https://www.aspetar.com/journal/viewarticle.aspx?id=180#.X3CNnmgzaUk