It would have no impact on him. It's not like going to the airport and taking a Ryanair flight. It'll be on a private jet where he can get a proper nights sleep.We will never know if it affected Kane or others today but is at least reasonable to assume that such a trip could impact him negatively on the pitch. He should therefore have never have been allowed to make that trip.
I could not believe my eyes when I saw on the sky sports app earlier in the week that he was over there.
Players jet off all the time to other countries, not a big deal in this day and age and I'd trust our medical department etc to know better than anyone on here if it's going to make a difference.