If United miss out on Maguire, they could turn to Tottenham's Toby Alderweireld or Leonardo Bonucci of AC Milan, who was due to face Mourinho's team in Los Angeles in the early hours of this morning.
Pogba shone brightly throughout the tournament in Russian Federation as France went all the way, which left many United fans wondering why he has been so underwhelming since his return to Old Trafford.
Despite winning the Europa League and League Cup last year, Mourinho's side have underperformed in the Premier League, coming no closer to ending their five-year title drought with David Moyes and Louis van Gaal axed since Sir Alex Ferguson retired in 2013.
Antonio Valencia was also forced to fly back from the tour with a torn calf.
But Smalling is confident of improving on last season's second place to champions Manchester City.
Asked if he was happy at how United's pre-season had worked out, Mourinho added: "No".
Mourinho takes aim at Pogba: It is a case of him needing to give his best
While Mourinho was subject to severe criticism after splashing £147m (R2.5b) on new arrivals but ending the season trophyless with a rigid style of football.
Despite playing a role in the pre-season friendlies against Club America and San Jose Earthquakes, Martial is still considered to be down the pecking order behind his fellow forwards. Nemanja Matic is struggling for match fitness, too, after joining the squad late because of his own post-World Cup break.
It's unlikely that Martial will fly back to the United States for the remainder of the tour and this is being viewed as a way to manoeuvre a summer exit. "Another thing is what is going to happen", Mourinho said in an interview with ESPN.
And, after being labelled as a No.6 by the United manager, the Belgian-born playmaker insists there is no one better to learn from.
Jose Mourinho's search for a solution to Manchester United's centre-back problems has reportedly led him to believe Harry Maguire could be the answer.
"I think the World Cup is the ideal habitat for a player like him to give (their) best".
The Enquirer never ran the story , a fact that many argue strongly suggests that the tabloid killed it at Trump's behest. Reuters was unable to verify the entire exchange between the two men because of the poor sound quality of the recording.
Mahrez was City's best player, who showcased his attacking threat with a decent run and cross midway through the first half. City play Chelsea in the Community Shield on 5 August before opening their league campaign at Arsenal a week later.
Black Ferns Sevens captain Sarah Goss echoed Mikkelson's sentiment, with fond memories of victories in Moscow and Gold Coast. Blyde opened the scoring in the final for New Zealand , who weathered some ferocious French tackling before cutting loose.
The White House has also itemized $200 billion of additional Chinese imports that it said may be subject to tariffs. Yet any such agreement would require extensive talks over how it would be implemented and verified.
Mara noted that Trump also directed violent language toward North Korea - before meeting with Kim Jong Un in Singapore. Iran has rejected talks with the U.S. , and Mr Rouhani has accused the USA of stoking an "economic war".
Secretary of State Mike Pompeo also called the development "consistent" with recent commitments made by Pyongyang. In absolute terms, this represents only a tiny fraction of North Korea's nuclear missile infrastructure.
Revenues meanwhile jumped 26 percent from a year ago to $32.7 billion, better than most analysts expected. Google's Other revenues -which now includes the smart thermostat business Nest - were $4.23 billion.
However, he shot to fame previous year with his song, Gummo which peaked at number 12 on the US Billboard Hot 100. Earlier this week the rapper was arrested in Texas on charges connected to an incident.
Reports of gunfire in the city's Greektown neighborhood began at 10 p.m. local time (0200 GMT Monday), CityNews.com reported. There are at least nine casualties - including children - after the shooting in the Canadian city of Toronto.
12 audio files sent to prosecutors in Michael Cohen probe
Trump or his attorneys come forward today, right now and claim there are no other tapes?" The tabloid never published the story. The tape details payments made to porn stars that President Tump had affairs with months before the 2016 presidential election.
Uber, Lyft suspend driver who recorded St. Louis passengers
But, of course, that all changed following the publication of the Post-Dispatch's investigation. "I didn't like it". "It was fake. On a recent Saturday night, a posting showed two women in their 20s in Gargac's black Chevrolet Silverado.
President Trump on EU Trade Negotiations: Better Late Than Never
On Tuesday, the Trump administration announced it would provide money to farmers impacted by tariffs due to the ongoing trade war. Sasse said he doubted Trump's trade policies will Make America Great Again as promised, but instead "Mak [e] America 1929 Again".
Trump threatens Iran with what 'few have suffered'
Iran and the USA have been at each others throats after the Washington axed their nuclear deal with Tehran . Wazne said Iran could well go to war to protect its oil exports , the foundation of its economy.
Demi Lovato admitted to hospital for suspected overdose
Demi Lovato has been taken to hospital after TMZ reported that the singer was suffering from what seemed to be a heroin overdose. Lovato previously completed a stint in rehab at age 18 for drugs, self-harm and an eating disorder before recovering in 2012.
Trump criticizes Federal Reserve over interest rate hikes
Although it is part of the US government, the Fed is considered to be independent, keeping it free from political pressure. Mr Mnuchin has faced criticism from global counterparts about the United States talking about currencies before.
Pompeo says Kim must keep vow to denuclearise
The White House push for negotiations in recent months was a dramatic shift from Trump's initial posture toward North Korea. Both Haley and Pompeo reiterated the USA stance that North Korean must denuclearize before sanctions are lifted.