In a week when Romero slammed the board publicly for an underwhelming winter market, he was sent off in defeat at Manchester United. It means the Argentine won't be seen in domestic action again until March 15.
Advertisement
Advertisement
Ahead of Tuesday's clash with Newcastle United, Frank said: "For me, I think he is a leader. He is a young leader. He's learning every day.
"I've said I used the example when I was 30 years old. I thought I was on top of the world, but I was no way near the level I am today in terms of leadership and understanding things.
"And then when you have a player that's playing with so much passion and aggression, things like that can happen.
"That's not to say he shouldn't learn from it, of course he needs learn from it, going forward."