Brazil worldwide Fred, highly-rated but raw full-back Diogo Dalot and third-choice goalkeeper Lee Grant all arrived at United by early July, but nobody followed despite Mourinho's explicit desire to bring in two more players.
After an unusual stuttering run-up that briefly gave way to jogging on the spot, Pogba rifled home the first goal from the penalty spot in the third minute after Daniel Amartey handled a shot from Alexis Sanchez.
Now it looks like no new arrivals will be heading to Old Trafford in this window.unless Mourinho has something up his sleeve.
"There was never a need to change what Man United do - the formula is there and there was never a need of a new philosophy", the 43-year-old told Malay Mail at Resorts World Genting last month.
Following a successful summer in which he helped France to win the World Cup, Pogba's future at United has been the subject of speculation over the last week of the Premier League transfer window.
He certainly endeared himself to the United fans on Friday evening as he produced a shockingly clinical finish to double the hosts' lead in the final stages of the match.
Pushed on whether there would be any ins or outs on Thursday, Mourinho added: "The information I have is no (nothing will happen)".
"Martial didn't have a pre-season", said Mourinho, quoted by ESPN. He's in the group of players who didn't have a pre season, it's as simple as that.
Mourinho splashed out £89m in 2016 to make the Frenchman United's club-record signing.
United's top brass want to follow City by "developing young talents instead of going for big-money older stars" that Mourinho prefers. Can Paul Pogba get the best out of Paul Pogba?
After a brilliant World Cup, Perisic is now worth nearly double that figure.
The relationship between Paul Pogba and Mourinho has also caught John's eye.
What lies ahead for Jose and United?
Leicester looked startled by United's early intensity but began to fell their way into the match as debutant James Maddison impressed and their wide men made in-roads. However, Mourinho's time in charge of the club has been filled with feuding with his players, ownership and the media.
- Korea slams U.S. officials for sanctions
- Peter Crouch tips Jack Grealish for England if he joins Tottenham
- 'Superman' star Margot Kidder died from 'self-inflicted drug and alcohol overdose'
- Improved Liverpool need to be more clinical for title tilt, says Klopp
- Manafort Trial Defense Chips Away at Credibility of Star Witness Gates
- Another strong quake hits Indonesia's Lombok, buildings collapse
- Kelvin Benjamin complimented Panthers WR after preseason game
- Barcelona duo Yerry Mina and Andre Gomes join Everton
- USA to impose new sanctions on Russian Federation for poisoning ex-spy
- Washington Redskins rookie running back Derrius Guice out for season