He said: "If he has an option now to go from Arsenal to Manchester City or Manchester United, as a footballer who wanted to win trophies and be judged on trophies, Manchester City looks like the place to go".
What we believe really is some players in football world, if you have a chance to sign them - it doesn't matter if it is in January, March or July - you have to try.
However there is no way Alexis Sanchez will agree to this. The players have two choices: Follow what you [the media] say, or follow me.
Arsenal boss Arsene Wenger has admitted Sanchez will leave his club this month, with the final decision on where he will end up now set to be handed over to the player and his advisers.More news: Power goes out at the world's largest tech conference
Fred recently signed with Shakhtar, a new five-year contract than just increased his transfer value.
Neville, who made nearly 400 appearances for United, feels it would send out a big statement should they beat City to Sanchez's signature.
It will be interesting to see if Sanchez plays against Bournemouth on Sunday.
The 20-year-old's potential has attracted interest from the Premier League with Arsenal and Tottenham strongly linked with a move for the South American attacker in recent weeks.
United is said to have presented Arsenal with a bigger offer than City, and although Mourinho claims it was not in the club's plans to sign players in January, he acknowledged that fantastic opportunities are worth pursuing whenever they present themselves.More news: Did Botswana Condemn Trump's Alleged 'Shithole' Slur Toward African Countries?
The Spaniard insisted his focus is on this weekend's game against Liverpool; he even advised the media to focus on football matters rather than transfer rumours.
City are willing to pay Sanchez £285,000-a-week while United are happy to go over £300,000-a-week in order to usurp their Manchester rivals.
"At the general level, I can tell you that myself and the Manchester United owners, we do not believe a lot in the January market".
"I am not going (to speak about it)", he said.More news: Man United boss Jose Mourinho gives big Zlatan Ibrahimovic update