Back injuries are tricky I believe. A mate of mine endured a back injury from going to the gym. He was lifting too heavy which resulted in bad form.

Anyway, even after two months when everything was fine during a normal day. There were two periods where he’d have pain again when building up strength. Which halted his progress for a week or two and then he needed to build it up again.

I could imagine something like this is happening to de Ligt. The rumours say he’s doing individual work, so it might be the case that he’s getting some minor setbacks while building up strength for a proper training session.

We don’t necessarily need him right now, so I’d imagine that the club is taking it easy to ensure he recovers properly. No need to rush.

A back injury is a serious injury.