O’Shea was repeatedly pressed on the difficulty all through the media convention alongside goalkeeper Caoimhin Kelleher.
He added: “It’s not a number one position, I’m the assistant. The chief is the boss and that’s clear.
“I don’t know why there must be this fixed. The boss is the boss, it’s quite simple. The gamers know that, you may ask Caoimhin about that. The conferences that have been coming throughout, the plans in place.
“So I don’t know why it’s important to hold occurring about that. For me personally, it’s clear from the workers’s perspective and the gamers’ perspective.”
Objectives from Declan Rice and Jack Grealish, two gamers who had beforehand represented the Republic of Eire at both senior or under-21s stage, have been sufficient to present England victory on Saturday.
Whereas the hosts have been second finest all through the competition, O’Shea welcomed the truth that the facet are again on the Aviva Stadium simply three days later to face Greece.
“You play towards a staff that has simply been within the Euros remaining and you realize you are going to be below loads of stress in a recreation like that. The truth that it was England brings that further little bit of scrutiny too.
“Clearly room for enchancment, we all know that. We all know England have been the very best staff on the day, however fortunately now we have one other probability to place in a efficiency towards Greece fairly shortly.”