Former Manchester United captain Roy Keane is not one to be shy about his opinions in regards to the Republic of Ireland national team.
During his playing career, Keane represented Ireland throughout and following his retirement has been part of the country's backroom staff too.
That's why he is very passionate about players choosing to play for Ireland and what it means to represent the country. Throughout history, the two countries have often battled for players' allegiance thanks to the 'grandparent rule'.
This controversial clause means players whose grandparents are a certain nationality, their grandchildren are also eligible to play for that country. READ MORE: Why Grealish gets booed by Ireland fans READ MORE: Keane confirms intentions to quit Sky and ITV One player to exploit that was Manchester City's Jack Grealish.