The Red Devils icon also claimed that the English full-back could still make an U-turn on his stance and eventualy stay back at Anfield, as he wrote: "I get why Liverpool fans are upset and even angry at the thought of Alexander-Arnold leaving - all supporters like to see local lads coming through at their club, and they never like to see them being sold. I feel like it is the fact he would be going on a free which has upset them the most, but that situation is down to Liverpool as well as Alexander-Arnold.
"We don't know why his contract has been allowed to run down - or whether that is down to him or the club - but it is something Liverpool have done with Mohamed Salah and Virgil van Dijk this season too, and also in the past with Georginio Wijnaldum and Roberto Firmino. No one seems to have said much about the other players letting their deals run down, just Alexander-Arnold. I think that's because he's a local lad, which feels a bit unfair. Alexander-Arnold has been an excellent servant to the club, so you can't begrudge him wanting to try something new. It would not just be a shame for Liverpool fans if he left because you want to see the best players in the Premier League but, if he does go to Real, I wish him well."
Rooney added: "Still, as I found out myself, just because there are talks over a transfer does not mean it will happen. It is well known that some United fans protested outside my house when they thought I was going to leave in 2010, but I'd agreed my new contract by then. Alexander-Arnold has not signed anything with Real yet and it would not surprise me if, even after all this speculation, he ends up staying at Anfield after all. A lot can happen before a contract is signed - as I know from experience."