The Liverpool v Union Saint-Gilloise game (2-0) was one of the very few occasions in football where brothers locked horns with each other.
"Really nice," Alexis told the BBC after the game. "Of course for the family [it is] something very emotional. I have played against my older brother before and never against Kevin so it is special for my family.
"Today my dad was here but I am sure everybody in our family was watching the TV so it was special. My dad played and knows what it means to play your brother as my uncle was too. I guess he cried a little bit."
"Yeah, we will [swap shirts]. I don't know if he wants from another players, but we will for sure."
The brothers took a family portrait with their father Carlos at Anfield.
Kevin, a centre-back for Saint-Gilloise, added: "[It was] very amazing for my family and for my team. For us it is great to be here. We wanted to win here today and it is difficult. Liverpool are a great team. I try to enjoy.
"It is difficult against a big team and I want to enjoy this moment, My family stay here and it is a big moment.
"He is the reason I suffer today but it is a very special moment. Of course, Liverpool in the last match come to Belgium. It is our revenge maybe but today I am only thinking in this game with Alexis and my family and now it is the best part of the match."
Liverpool won the game 2-0, maintaining a 100% record in the Europa League so far this season.
