United have, however, struggled to build on that deal, with Mourinho conceding that there may be no more additions on the final day of the summer window.
The move was created to ease disruption in the first few weeks of the campaign after a number of high-profile players, including Alexis Sanchez, Philippe Coutinho and Virgil van Dijk, missed matches at the start of last season due to transfer speculation.
"No miracles", he told a press conference (via United's official website).
"They returned on Monday".
"I see him very well but we need words with that small group to see if they can give us a hand".
"He had nine days of pre-season where no training, no football, absolutely nothing".
Mauricio Pochettino says his side are BOLD for not signing anyone
Tottenham Hotspur manager Mauricio Pochettino has shed some light on defender Toby Alderweireld's future in north London . Pochettino added: "We have a very good squad, with very good players and it is very hard to add players to that".
Sources have told ESPN FC that Ed Woodward and Real Madrid president Florentino Perez met in Miami last month but negotiations for the French World Cup victor never got off the ground. I think that's it. I am preparing myself mentally and physically to face all that lies ahead.
"After Spurs there is an global break".
"If he goes the opposite way and things don't go well and he keeps moaning and groaning, I would be disappointed if they didn't just pull the rug from under his feet and say, "this isn't looking good, we've had enough of you, get out of here".
'Now that I know my team-mates, I can focus on what I want to win.
And in news that is sure to frustrate most United supporters coming to terms with getting behind the squad they have, and resolving to do so by hoping the defence will be freshened up from within, one of the club's most talented youngsters is going to leave the club on loan.
The Red Devils did not get off to a great start results-wise with three consecutive draws coming against Club American, San Jose Earthquakes and AC Milan - the latter in the International Champions Cup.
Varane worked under Mourinho at Real Madrid and has gone onto become a multiple time Champions League victor.