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Shaw suffered a horrific double leg fracture against PSV Eindhoven in a Champions League fixture and ended up missing the rest of the season.
But the severity of the injury was much worse than a spell on the sidelines. Left with scars on his right leg, doctors feared he was close to requiring it to be amputated.
"I'd be lying if I said I didn't think about stopping playing," he said at a press conference in September 2018.
"I had a lot of complications with my leg and that was the really hard moment for me in my career.
"No-one knows but I was really close to actually losing my leg. I never knew that until six months later when the doctor told me.
"At the time, they were thinking about flying me back and if I'd have flown back, I would probably have lost my leg because of the blood clots and stuff.
"I've got - I don't want to talk about it too much - two scars down the side of my leg where they had to cut it open and pull them out because of how severe it was.
"But I don't really care about that anymore. I feel really strong and my right leg is exactly as it was before my leg break."
Shaw would start just 17 Premier League matches in the two seasons that followed and regularly came in for criticism from Jose Mourinho, who questioned his fitness and commitment to the cause.
Shaw's improvement has prompted many to rate him as the Premier League's best left-back - with his superb showing against West Ham last night highlighting his incredible consistency.
"He's been working steadily and really well," Solskjaer said of Shaw's performances, as per the Manchester Evening News.
"He got this injury towards the end of last season, he worked really hard to get fit.
"He's got competition in Alex [Telles], Alex has done well. Luke has really taken on that competition. He goes forward, he trusts himself. He's become a dad - that does a lot to many - and Luke has matured so much I'd say in the last two-and-a-half years and I love to see his development.
"He's now 25 and has become a man, one of the experienced boys in our team and his attitude has been spot on. When you have this talent the world is at your feet."
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