The forward has scored a measly five goals in 45 games in all competitions, with many fans questioning his work rate, fitness and general commitment to the club.
The Red Devils saw off city rivals Manchester City for the Chilean's signature last January.
Both Pogba and Sanchez rank as United's top earners in wages, and receive staggering amounts of bonuses for goals and assists in every match.More news: Jonas Brothers return to Saturday Night Live after more than 10 years
"I don't want to blame all the players because I think that some players are here (at United) and they themselves don't even know why they are here". Pep Guardiola had hinted in the build-up to the fixture that City had been offered Pogba a couple of months earlier and the player showed why he is so highly coveted as his double was the catalyst that helped United overturn a 2-0 deficit into a 3-2 win.
When pushed on whether his pal would remain at Old Trafford beyond the summer, Evra added: 'I think he will leave because you need to feel the love when you play somewhere, you need to be committed.
"Don't tell me he loved Manchester United when he was a kid".
"So I want to know what is the real reason for choosing United?"More news: Kim Kardashian and Kanye West ‘name son after Glasgow train station’
"It's either the money or he wanted to be the number one, take the number seven shirt and be the star".
Patrice Evra didn't hold back when giving his honest assessment on Alexis Sanchez.
Sanchez has been linked with a move away from Manchester United with Juventus a rumoured destination.
The pair's dividends are however now said to be causing friction in United's dressing room, with the UK Metro reporting Ole Gunnar Solskjaer has been left dealing with "rifts and jealousy" among players.More news: Liverpool fall short of title despite Mane double against Wolves
"I'm not going to speak too much about individuals".