United fell to a 3-1 defeat to West Ham on Saturday, leaving the Red Devils in 10th place in the Premier League table.
Interim head coach Dave Sarachan - USMNT general manager Earnie Stewart said last month that he intends to hire Bruce Arena's permanent replacement by the end of the year - has chosen 24 players, 15 of which are 23 years and under, to take on Colombia (Oct. 11, in Tampa, Fla.) and Peru (Oct. 16, in East Hartford, Conn.).
Pogba's frustrations are evident - footage his clash with Mourinho during a training session went viral - and two teammates are reportedly on his side during the tense battle.
A United Kingdom newspaper claimed Zidane called Mourinho to clarify suggestions he has been lined up to take charge at Old Trafford.
Sanchez was hauled off during a 1-1 draw with Wolves last weekend.
"Ask the guy behind you, he was the one who wrote it", Mourinho responded, referring to Sun journalist Neil Custis.
"What I can do to improve things I do, and I will improve the things that depend on me and my work", Mourinho said. "This week it was time to agree and leave Alexis out".
"He knows Man Utd is maybe the best club in the world, so they have a lot of pressure, but Paul Pogba is a great player".
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Either way, Sanchez looks like the latest player to publicly fall out with Mourinho and, as a result, his future is up in the air.
"If you want the truth I think it was honestly horrendous".
Mourinho's time at Old Trafford may be running out, particularly if he fails to summon a response when United host Valencia in the Champions League on Tuesday.
United remain the world's richest club for now, but that is not being reflected on the field for frustrated fans more interested in points than profits.
Mourinho brushed aside concerning statistics and perceptions in Spain, while also refusing to say whether he had spoken to executive vice-chairman Ed Woodward in the wake of Saturday's defeat.
David Moyes and Louis van Gaal were both dismissed after failing to qualify and United are already five points off the top four.
Meanwhile, German Bundesliga Champions, Bayern Munich, have been preparing to play against 4-time European Champions, Ajax, at the Allianz Arena.
José Mourinho spoke yesterday of looking around the Manchester United dressing room and seeing three groups within his squad: "sad people", "people that don't look like they lost the game" and others "so-so".