Mourinho continued to show the strain after Monday's 3-0 loss to Spurs at Old Trafford when he walked out of his post-match press conference after demanding respect for having won three titles with Chelsea.
One of those add-ons was triggered when he scored his 25th goal for United - something he achieved by the end of his second season at the club - but after scoring 17 goals in 49 appearances in his first season in England, Martial has only scored 19 in 87 over the last two years.
"The manager has spoken to us all a couple of weeks ago and said everybody starts from zero", said Rose.
"We all have to start again trying to impress him and that's great".
'Me and the manager have had a conversation over the phone, as well as two one-hour meetings over the last couple of weeks.
"We're (Rose and Pochettino) both aware of the situation". I came from a very good season, I was second top scorer in the team, only behind Cavani.
"It was fantastic", he added. I thought there was going to be a change but never did I think that it was going to be me coming in. "I'm really pleased for him that he looks like he's playing with confidence".
Mourinho has not lost the dressing room but morale has suffered in recent months and it was noted that only eight players were on the team coach from Carrington to the Lowry Hotel for the Spurs game.Others made their own way to the hotel, with Paul Pogba arriving in a chauffeur-driven Rolls-Royce. I'm the only manager to win in Italy, Spain and England.
Following the lack of game-time, Moura chose to jump the ship and last January made a move to Tottenham for just £25m.
With all the whispers of discontent coming out of Old Trafford, reported unrest between Jose Mourinho and a vintage collection of his squad, and successive defeats in the Premier League, the England worldwide believes this fixture couldn't have come at a better time.
He added: "I'm certainly not going to question his conduct because he knows what he is doing, I'm pretty sure of that, whatever everyone else thinks".
Rose endured a tough return to first-team action after being restored to the starting XI, as his poor backpass to Hugo Lloris in the first-half sent Romelu Lukaku through on goal, though his blushes were spared after the Belgian marksman fluffed his lines. It's good to see how we can do against them.