But he also said he would not be afraid to take a leaf out of the disciplinary book of his former United manager and mentor Alex Ferguson, whose legendary temper tantrums became known as the "hairdryer" treatment.
In the initial report, Sanchez was alleged to have said to Rojo: "I told you so!"
The Norwegian, 45, who spent almost 15 years with United as a player and reserve team coach, has stressed the importance of his stars playing with a smile on their faces under his leadership after a miserable season so far.
Spaniard Guardiola, who played for Barcelona for 11 years before winning 14 trophies including two Champions League titles as manager, said United would not have turned to Molde manager Solskjaer if he did not fully deserve the opportunity.
While Sanchez will have no involvement away at Cardiff, back-to-back home games against Huddersfield on Wednesday and then Bournemouth on Saturday give the Chilean the chance to get some minutes under Solskjaer.
"I don't think the recruitment's been great and I do think the players get away with murder, in the way they hide behind the manager. You have to tell them the standards we've got".
"I can't wait to help the team", he added.
"I'm that old that I'm not on Twitter or Facebook - maybe Facebook is old now - but that's just common sense for me, what I've spoken to them about". "Football has evolved, of course, and the gaffer [Ferguson] was in charge of more or less the whole club".
Nevertheless, he feels the onus remains on the manager to exercise influence over players as Ferguson did.
"The structure of the club has developed".
United resume their league campaign this afternoon against Solskjaer's former side, Cardiff City.