Jose Mourinho has opened the door for Alexis Sanchez to join Manchester United.

Arsenal boss Arsene Wenger put his decision to leave Sanchez out of the squad for Sunday's loss to Bournemouth down to an impending transfer.

This coincides with reports linking United to agreeing a £35m deal for the Gunners star.

And although Mourinho admitted the club hadn't planned to sign anybody in January, he did reveal that a 'fantastic opportunity' would tempt the club.

"Our squad was not [built] to have new players in January," said Mourinho.

"We build a squad with this idea, with this philosophy that I share with Mr [Ed] Woodward and the owners.

"Normally the investment is to be made in the summer. The balance of the squad is made in the summer.

"But sometimes, it [a transfer] can happen. Okay, if on the table is a fantastic opportunity, you fight for that fantastic opportunity. If it happens, it happens. If it doesn't happen, it doesn't happen. But I like my squad and I like my players.

"I think normally next summer we will try again to improve our squad in the different departments and try to make every department stronger. That's the normal situation with us.

"If in the winter market you do something, you have to do something that stops you to do it again in the summer. So you are not going to buy a goalkeeper now and buy another goalkeeper in the summer. So if you decide to improve the goalkeeper group now, you are not going to improve it again in the summer.

"Let's say in the summer we have three targets - a defender, a midfielder and an attacking player - if in the winter you do one of the three, then in the summer you are going to do three minus one."