Alejandro Garnacho's agents were spotted at Stamford Bridge as Chelsea took on Wolves.
The 20-year-old forward has been linked with a surprise departure from United this month, with Chelsea among several clubs reportedly interested in the Argentine international if he becomes available for transfer.
It is suggested that United are 'under increasing pressure to sell a highly-valuable academy player', which would equate to pure profit under the Premier League's PSR rules.
Speculation about Garnacho potentially joining the Blues was further fuelled on Monday night when Carlos Cambeiro and Quique De Lucas from the Leaders agency, representing the United forward, were seen in west London.
Rio Ferdinand has singled out three Manchester United stars who must be sold in January if the club are going to improve on their woeful start to the season.
The players brought to Ferdinand's attention on his podcast Rio Presents were Marcus Rashford, Antony and Tyrell Malacia.
He said: "I think Antony's going, someone said to me, Real Betis or somewhere like that. Just get them out man!
"Sorry, no, I'm just being honest. The more these type of guys are around, where there's just a bad noise, they all want to go, they're all happy to go - let's just get them out. Let's start afresh.
"You know what it's like, if there's people who are unsettled in there and it's not going to plan and they're not happy, it spreads. It's like a cancerous, bad energy."
Manchester City have announced the signing of defender Abdukodir Khusanov from Lens for £33.5m.
The centre-back has joined the Premier League champions on a four-and-a-half-year contract which also contains the option of a further year until June 2030.
Sheffield United have agreed a £10million deal with Leicester to sign Tom Cannon.
Personal terms are now under discussion and not yet agreed.
However, a medical has been scheduled tomorrow.Cannon was recalled from a loan at Stoke so that Leicester could look to sell him.
PSR is an issue at the forefront of Leicester's transfer market thinking and they are expected to only bring in players on loan if they add any this month.
Tottenham have recalled young striker Dane Scarlett from Oxford - but plan to loan him out again.
Spurs' first team are painfully short of attacking options after Dominic Solanke and Brennan Johnson joined their massive list of injuries.
They missed out on Randal Kolo Muani, who is joining Juventus on loan from Paris Saint-Germain.
Boss Ange Postecoglou said after Sunday's defeat to Everton that the club were doing everything in their power to add new faces, but that nothing was "imminent".
Sheffield United have agreed a deal to sign Ben Brereton Diaz on loan until the end of the season.
Brereton Diaz, 25, scored six goals in 16 appearances for the Blades last season and was keen on a return to Bramall Lane.
Sheffield United have a £10million option to buy included in the deal.
The Chile international joined rock-bottom Saints from Villarreal in a £7m deal in the summer but has started just four Premier League games and has not scored for the club.
Manchester United have entered talks to sign 20-year-old left wing-back Patrick Dorgu, reports suggest.
According to The Athletic, United are making moves in the market to bring in the right players Ruben Amorim wants.
The report claims transfer chiefs have begun lining up options before making decisions on incoming and outgoing deals, with Lecce star Dorgu being among the names discussed for an incoming deal.
Amorim, 39, is keen to add reinforcements to his squad and get the rebuild moving in the right direction.
Nothing has yet been agreed with the Serie A club over the Dane, but talks are said to be progressing.
Leece are in a strong bargaining position after the star signed a new deal running to 2028 in October.
Chelsea outcast Ben Chilwell has been lined up for a stunning transfer to Juventus.
The left-back hasn’t made a single Premier League or Europa League appearance under Enzo Maresca this season.
Chilwell is now hoping to secure a move away from Stamford Bridge before deadline day.
And Alfredo Pedulla claims Italian giants Juventus have emerged as leading contenders.
Juventus hope to add some ball-playing technicality to their backline by beating Borussia Dortmund to the loan signing of Chelsea’s versatile Portugal international Renato Veiga.
But Chilwell has also emerged as a target due to strong interest from Manchester City in left-sider Andrea Cambiaso.
Chiefs from Juventus are now set for a mega-meeting with Chelsea counterparts as they look to secure deals for both Veiga and Chilwell.
"We've still got some restrictions we need to be mindful of in this window.
"We will need to add people. We need to make sure next season when we're playing in the new stadium we're in the Premier League, that's the goal at the moment."
EVERTON transfer supremo Kevin Thelwell and chief scout Dan Purdy face the chop from the new American owners.
Thelwell has been director of football for the past three years and played a part in David Moyes’ appointment to replace Sean Dyche.
Head of scouting Purdy has held a number of roles in more than a decade at Goodison Park.
The pair, whose contracts are up at the end of the season, had to work within financial constraints before new owners were found.
Having made the decision to sack Dyche, the Americans are keen to reshape the operation and Moyes could have a major say.
David Weir, who is technical director at Brighton, has been linked with a return to a club where he spent eight years as a player.
Atalanta senior scout Mick Doherty is a more likely option — ironically he is the brains behind the Serie A club’s attempts to sign Everton striker Dominic Calvert-Lewin.
