Onana had been wearing the shirt specifically designed for players, with a closer fit than those made available to fans — but according to sources found it too tight and has now switched to a looser, replica version.

United’s 2-1 victory over Sheffield United on October 21 is thought to have been the final straw for the Cameroon international, who asked to change his top from then on.

Several Man United players have complained that the official adidas kit is is too tight for them

United players have not worn the official home socks since the second game of the season, where they lost 2-0 to Tottenham. Alejandro Garnacho (left) sports the official socks while Bruno Fernandes (right) wears a replica version during the Manchester derby

The official home socks for this season cost £20 on United’s official store

However, United players have been wearing adidas-branded £13 socks with their home strip

Last year, when David de Gea was in goal, complaints were made that the kit was too baggy.

However, Onana has a larger frame than the slight Spaniard and it appears the subsequent adjustments have backfired.

Players have also complained to Ten Hag and the club’s kit staff that the socks are too tight on their calves.

Some players cut holes in the back of their socks but the switch to fan-issue socks has been used as a temporary solution since the 2-0 defeat at Tottenham Hotspur on August 19.

United’s authentic home kit will set punters back at least £82.50 from the club’s official store

But United’s stars have been wearing the £60 replica version during matches due to its fit

Andre Onana had issues with his jersey the but has now switched to a looser, replica version

At many clubs, socks now resemble a sleeve, with no foot section. Instead, footballers often use ankle socks which they feel give greater support and grip.

Both United and adidas declined to comment. The German firm expect to have resolved the issues over the next month when they have completed what one source described as ‘light amendments’.

After Sunday’s 3-0 derby trouncing at the hands of rivals City, United return to Old Trafford on Wednesday to face Newcastle in the Carabao Cup.