Arsenal are fully aware that replacing a player of Sanchez's calibre is no easy feat, especially considering his importance to the club.
The report also suggests Mourinho was unwilling to enter the race to sign Sanchez in the previous transfer window in an attempt to avoid becoming embroiled in a summer-long battle for the Chilean's services.
Chelsea manager Antonio Conte has reiterated his great admiration for Alexis Sanchez, but said he was not attempting to lure the Arsenal forward to Stamford Bridge when the two were pictured in conversation earlier this week.
"And as Manchester United are one of the biggest clubs in the world, if not the biggest, then they will be looking at it".More news: January 11 is National Human Trafficking Awareness Day
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The Premier League leaders have always been linked with signing the Chilean forward, and had a reported £60m offer for him accepted by Arsenal on deadline day last summer. United are in the running to sign Sanchez in the winter transfer window as the 29-year-old Chile global is desperate to leave Arsenal, but they are also keen to sign Ozil.
According to The Telegraph, the Red Devils are interested in signing Jamie Vardy from Leicester City, or Javier Hernandez from West Ham United, if they can't secure a deal for Sanchez this month. If Pep wants him again now, I'm sure he's thinking: 'I'm going to go there second time round and do it properly this time'. City have a very comfortable advantage and they can sit on that; it is the sort of lead that gives a lot of tranquillity and takes away the pressure from the guy that comes behind you.
Where will Malcom be playing his football next season?
"The reason for this is he feels left-back is very hard to get the player he wants - Alex Sandro - because of the price Juventus are asking for". O'Neill had been expected to extend his contract with the Republic of Ireland after Keane had persuaded him to stay on, however a return to top flight management might tempt the pair of them to come to England.
Yes Manchester City have been very much interested and are the front runners, but there still are many clubs that are lurking around to grab the Chilean.