The Rugby Club caught up with rugby brothers Ignacio and Juan-Martin Fernandez Lobbe.
The Lobbe brothers spill the beans on each other
At Franklin's Gardens on Saturday afternoon, the captains of Northampton and Sale will put more than just title aspirations on the line.
The two skippers are Argentina's finest sporting siblings - Ignacio and Juan-Martin Fernandez Lobbe - and as well as both playing for their national team they were also once brothers in arms in the Guinness Premiership at Sale.
But following Ignacio's transfer to the Saints last season, the Lobbe brothers are set to go head to head for the first time and The Rugby Club caught up with them to get their true feelings about one another.
Here's what they had to say...
The Lobbes on sibling rivalry...
Juan: He will say he will always beat me because he will get into my head and beat me mentally. That's what he will say, he was always trying to annoy me.
Ignacio: The worst thing I did to wind him up was when I was 18 and he was 11, something like that. He got a new bike and the first thing I did was to get on the bike straight away and started cycling into the swimming pool. He went crazy and got a big stick and started following me over the park and tried to smash me with that.
Juan: I had to use everything that I have in hand to fight him. Just throw things at him, a hammer or whatever.
The Lobbes on brotherly love...
Ignacio: He was my first supporter. For every training session he would go and watch, for every game he would go and watch from the stands and go crazy. He would try and go with me afterwards in the changing rooms. After eight years he was playing with me in the national team so I was really proud of him. Singing the national anthem with your brother - you don't get anything better than that.
Juan: We shared rooms, we were very close. He was my idol and when he started playing for the national team, for me that was everything.
Ignacio: At this moment we phone each other a lot because he doesn't know what he's going to do with his future so we're talking about that a lot. We really talk, he normally plays on Fridays so sometimes he comes down here and watches a game and stays the weekend and we have a barbeque. He is also the godfather of my daughter Lucia so they come to see her. Or sometimes when we are free we go to Manchester because I love Manchester.
The Lobbes on the best football team in the world...
Ignacio: Boca Juniors are the best football team in the world. That is my passion. I'm really crazy; when I was still in Argentina we would go to see them every weekend - and not in the box with a cup of tea. In the middle of the party with the fans - or with the hooligans as you would say here in England.
Juan: We both love Boca Juniors and we love Liverpool too - just to fight the guys in the squad. They are all from Manchester and like United. That would be the easy option, but we still have a good time with Liverpool and have a laugh with the boys, fighting each other.
The Lobbes on nicknames...
Juan: You never mess with the Godfather - and that's what you do with Nacho. You listen to him and you follow him.
Ignacio: They think that like the Godfather I can get whatever I want, but it's not true. I am the good Godfather. Juan's nickname is Corcho, which means cork in Spanish. His head is the shape of a cork from a champagne bottle.
The Lobbes on which brother is better...
Juan: Nacho of course. Nacho is better.
Ignacio: He never gives up, never gives up. He is like the rabbit of the batteries, he never stops when he is on the pitch. It's amazing.
Juan: The guys in Sale weren't clever enough and didn't keep him. We lost a great player and a great leader and a great guy for the week. He was a great team player.