Marcos Rojo found out his Manchester United career was over on social media after reading that his contract would not be extended, sources have told ESPN.
Rojo was still waiting to hear from United officials about whether they would take up their option to extend his deal by another 12 months to 2022 when manager Ole Gunnar Solskjaer announced at a news conference in January that the club had decided to allow the 30-year-old to leave.
The defender ended his six-and-a-half year stay at Old Trafford on Tuesday after signing a permanent deal with Boca Juniors.
United said in a statement announcing his departure that they had received an "undisclosed fee" for Rojo, signed by Louis van Gaal, for £16 million in 2014, but sources have told ESPN that his contract was ended by mutual consent before signing for Boca as a free agent.
United handed the Argentina international a three-year contract -- with the option of another year -- in March 2018 but after penning the deal the former Sporting Club man started just 12 games for the club. He leaves having made 122 appearances, including in both the 2016 FA Cup final and 2017 League Cup final.
The United squad were due in on Wednesday to begin preparations for Everton's visit to Old Trafford on Saturday but instead the Norwegian told his players to spend the day at home after being so impressed with their performance in equalling the Premier League's biggest win.
Speaking at a news conference held on Friday, Solskjaer said he expects Edinson Cavani to be fit to face Everton after being replaced during the record-equalling win over Southampton because of an ankle injury.
"Edinson should be available," he said. "He got a bad ankle knock. Eric [Bailly] is a doubt but apart from that everyone's raring to go.
"No one will get carried away with the scoreline [against Southampton]. We played against 10 men and that's demoralising when they lose players like they did.
"When we got to 2-0 the game was more or less over and we've not mentioned the game since. All the focus has been on Everton."
The club will mark the 63rd anniversary of the Munich Air Disaster on Saturday. A fan service will be held online and United are asking supporters to avoid attending the stadium to pay their respects in line with coronavirus protocols.