Half our players have done it over the past 3/4 years. I agree with Ralf that they should stay at the club but that’s not relevant to what was happening previously. I don’t see any other players singled out.
The more I think about it and the least it makes sense. Injured players are on a different schedule than the rest of the team, it's one of the notorious reasons behind players struggling from a mental standpoint when they are injured for a long period of time since they are not with the rest of the team despite using the same facilities. And places like Doha and Dubai specializes in sports science, they have the best facilities, they have a large proportion of the best trainers and medical specialist which is why pretty much all top athletes, they ones competing individually end up spending a fair amount of time there.