De Boer was sacked by the Eagles in September after losing his first four Premier League matches without so much as mustering a goal, let alone a point.
That record was brought up as Mourinho went after the Dutchman, having been irked by the former Palace manager saying it was “pity” for Rashford to be playing under the United boss given his preference for short-term success over player development.
“I read something, some quote from the worst manager in the history of the Premier League,” the United boss said.
“Frank de Boer – seven matches, seven defeats [sic], zero goals – where he was saying that it was not good for Marcus Rashford to have a coach like me because the most important thing for me is to win.
“Marcus is 20 years old and I’m really pleased with him,” says Jose, on @MarcusRashford. “Does he play every match from the start? No, of course not. But he’s a player that we trust and I’m really happy.” #MUFC pic.twitter.com/0BmWLw2oYE
— Manchester United (@ManUtd) March 12, 2018
“If he was coached by Frank, he would learn how to lose because he lost every game.”
Palace lost their first seven games without scoring, though the last three of those came under De Boer’s successor Roy Hodgson.
Mourinho’s stinging comment came in response to a question that did not even reference De Boer, only whether Rashford would retain his starting berth after a match-winning brace in Saturday’s 2-1 comeback win against Liverpool.
The Portuguese did not actually address that question ahead of the return leg against Sevilla, nor did he give a straight answer on Paul Pogba’s availability on Tuesday.
The midfielder – who surprisingly started the goalless first leg on the bench in Spain – was injured on the eve of the Liverpool clash and was conspicuous by his absence from the section of training open to the media on Monday.
Mourinho offered no insight into Pogba’s injury, just that the club-record signing could be involved against Sevilla.
“(Pogba) did (train) after you left,” Mourinho said.
“I don’t know (if he can play), we don’t know yet, but he trained a little bit after you left.”
Mourinho confirmed that Anthony Martial is back in contention after an injury of his own, and that Daley Blind, Ander Herrera, Marcos Rojo and Phil Jones remain absent.
The latter will also be unavailable for England over the international break, with the Portuguese saying Gareth Southgate should only select Jones if he “wants to take him for the medical department because he’s injured”.
Mourinho was in spiky mood ahead of the visit of Sevilla, repeatedly making self-deprecating remarks about his Champions League triumphs as Porto and Inter Milan manager.
Neither of those victorious sides were favourites for the crown and the Portuguese believes United are outsiders this time.
Asked if he feels he has the conditions to bring a fourth European Cup to Old Trafford, Mourinho said: “Not yet, but when a team reaches the last eight anything is possible.
“Now I have only one name in my mind: it is Sevilla. I know that it is very difficult to go through.
“If we go through to the quarter-final draw, it doesn’t matter the opponent – for us or for Sevilla – will always be one of the big names in European football, but we will try.”
Provided by Press Association Sport
Manchester United captain Michael Carrick has announced his intention to retire at the end of the season and join Jose Mourinho’s coaching staff.
The 36-year-old is the longest-serving player at Old Trafford, having joined from Tottenham in 2006 and gone onto win the Champions League and five Premier League titles, among many other trophies.
Carrick, capped 34 times by England, has looked likely to leave United in recent summers only to pen extensions at a club that rewarded his fine service with a testimonial last year.
The 36-year-old was handed the captain’s armband last summer after the exit of Wayne Rooney but has only made three starts in all competitions this season.
It has long been expected that Carrick would hang up his boots at the end of the campaign – something the veteran confirmed on Monday, along with his intention to take up manager Mourinho’s offer to join the coaching staff.
“There comes a time when as much as you like it or don’t like it, your body tells you it’s time to stop playing football,” the 36-year-old said.
“So that’s pretty much where I’m at, which is fine. It’s something you’ve got to accept so that’s where I am at.
“It’s kind of been sorted out (for a coaching role). We’re still talking about it, to be honest, so there’s nothing to totally confirm as yet.
“But, yeah, it’s looking likely.”
Manchester United midfielder Scott McTominay was one of six players handed their maiden Scotland call-ups as manager Alex McLeish named the first squad of his second spell in charge.
McTominay, Barnsley striker Oli McBurnie, Wolves left-back Barry Douglas, Hearts goalkeeper Jon McLaughlin, Hibernian midfielder Dylan McGeouch and Aberdeen defender Scott McKenna are all included.
McLeish also selected three more uncapped players for the friendlies against Costa Rica and Hungary later this month – Millwall goalkeeper Jordan Archer, Rangers winger Jamie Murphy and Fulham midfielder Kevin McDonald.
Provided by PA Sport