Mourinho outlined no players would be leaving or coming in on deadline day, but it appears as if he tried to negotiate a deal to secure Lindelof's signature.
Manchester United failed in a late bid to sign Benfica defender Victor Lindelof
Portuguese newspaper A Bola claim Benfica president Luis Filipe Viera was in England after finalising Helder Costa's move to Championship side Wolves.
But he also met up with United officials to discuss Lindelof's potential move to Old Trafford.
Jose Mourinho has held a long-term interest in Lindelof
Lindelof has made 11 appearances for Sweden and has scored one goal
How Manchester United could look with Victor Lindelof
Wed, December 28, 2016
Is this how Manchester United could look with Victor Lindelof in the starting XI?
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Is this how Manchester United could look with Victor Lindelof?
However, United were unable to strike a deal with Benfica for the centre-back before the 11pm deadline.
Lindelof is valued at £38m and has impressed for the Portuguese outfit this season, keeping 12 clean sheets in 24 appearances.
The Sweden international signed for Benfica in 2013 and is contracted to the club until the summer of 2020.