British professional boxer, Amir Khan has been publicly criticised by his own trainer, Virgil Hunter.

Back in April, the 32-year-old Khan suffered defeat against welterweight champion Terence Crawford after being controversial withdrawn by his corner following a nasty low blow.

Khan received plenty of criticism afterwards and even Crawford questioned whether Khan had just given up and 'quit'.

Since then, Khan's own trainer has actually gone on record to condemn the Olympic silver medalist.

According to Virgil Hunter, Khan does not do enough training between fights and is letting his skills deteriorate, along with his advancing age.

When asked the big question if Khan should consider retirement, Hunter told BBC Sport: "I would like to see him commit to many training camps in between fights and to work on his weaknesses before he makes that final decision to really see if his skills are gone, or if he is just letting them lay in a pile and deteriorate slowly.

"He never has practice in between fights. He trains hard for 10 weeks but it's not enough."

"There's little things that he does that cause him to be out of sync," added Hunter.

"His timing is off. His distance is not where it should be. He doesn't have a sense of range and distance and those things are not due to age. That's from practice.

"His hand speed is still there but his sense of distance and range is not there and that's what he needs to work on."

At the age of 32, Khan has already had quite a long career, amassing 33 wins and five defeats spanning a 14-year professional boxing career.

Khan at the peak of his powers was a 2004 Olympic silver medallist and a unified light-welterweight champion back in 2011.

He continued to fight until 2016 where he succumbed to a defeat to middleweight boxer Saul 'Canelo' Alvarez.

Following this defeat, Khan decided to take some time off professional boxing and returned 23 months later to earn victory twice more before losing out to Crawford most recently. 

His return is an indication of his heart for the game but boxing analyst Steve Bunce believes it may be time for the Bolton native to hang up his gloves.

At the age of 32, it certainly does not have to spell the end for Khan, who has enjoyed a fruitful career at the top level, but some will feel he needs to retire sooner rather than later.