How do teams deal with longer international window?

With the international window extended to four games, how do nations like Northern Ireland deal with the additional demands on players and staff?

スポーツ面でFlexCharが伝えている話題です。With the international window extended to four games, how do nations like Northern Ireland deal with the additional demands on players and staff? いま検索と会話が集まっているため、FlexCharが取り上げています。