Unbeaten middleweight titlist and knockout sensation Gennady Golovkin continues to tear apart everyone placed in front of him. But in 2015, "GGG" is looking for a challenge.

The Kazakhstan native believes he just might get that test in former world title challenger Martin Murray (29-1-1, 12 KOs) on Feb. 21 in Monte Carlo (HBO, 5:45 p.m. ET/PT).

Golovkin (31-0, 28 KOs), 32, who recently moved his family to California, caught up with ESPN.com during training camp in Big Bear to talk about Murray and what his plans are for the new year.

Why was Murray the right opponent this time around?

First of all, I respect him. Because I told him, "I want a fight." So I watched his fight with Domenico Spada and it was a very good fight. I saw two other fights -- one against Sergio Martinez in Argentina and Felix Sturm in Germany. Very close fights. I think he understands he is big guy. He is strong guy. I think he understands right now his situation -- this may be the last title fight for him. He is hungry, he is smart and experienced. He understands. I think it will be a great fight.

This will be your third fight in Monte Carlo. What keeps bringing you back?

It is a beautiful city, a beautiful city. There are VIPs and people in this town who just love and understand boxing, and of course the king [Prince Albert II] and his family. I praise and thank them. It is a very great show and a good atmosphere. And maybe it's more steps for me for the world -- not just for Europe, not just for Kazakhstan, not just for Russia, not just for United States. This is for the world. For me, it doesn't matter. I like boxing and not just to fight in front of the United States. I have had fights in Panama City. I have had fights in Denmark. I had fights in California. I have a lot of great fans and a lot of great people who watch my fights around the world. This is very important for me.

Who do you think deserved to have won Murray's 2013 middleweight title fight against Martinez?

That is a good question. For me, Martin -- he did more and was bigger. But he's not the champion, of course. [The judges] showed more respect for Sergio, the champion. I remember this fight. I remember it well. [Martinez] was not ready for this fight. I think Murray won because of two knockdowns -- one was ruled a knockdown and then the second time [ruled a slip.]

Will Murray become the first opponent to push you into the championship rounds?

Right now I need a decision fight. I need it. Maybe Martin is the best opponent and challenge of my career. And maybe he's the best opponent for a decision fight because he is smart and not an easy opponent. He is a good fighter, he is strong and a big guy.

You proved in 2014 to be a big ticket-seller in both New York and Los Angeles. Are there any other cities you hope to conquer this year?

Yes, this is very good for me and for my team and career right now. This is my first step for this year, which is Monte Carlo in Monaco. Second step, I have in May in the United States. I think it could be the Forum in L.A. or maybe Madison Square Garden. This is a big step for me and for my team and my career. I hope we will make more big steps and even better ones.

Why was it important for you to move your wife and son from Germany to California?

It's very important for me because this is my family and my life. I understand my situation because these next couple years are very important for my boxing career, but also for my family. For my kid, right now he is five years old and I want him to go to school in California. It's very good for him. I am relaxed here and feel like home. California is now my second home. I have been coming there the last five years. I feel great and so much better with my family and my wife.

What will it mean for you to have a training camp in which you can go home to your family each day?

Absolutely huge. Right now my family will stay with me in Big Bear and it's great. My wife, she helps me. She cooks food for me and it's just relaxing. It's a life that is very good for me.

How often do you plan to fight in 2015?

I think four times. I hope so. My first in February and my second in May. I think then maybe in August or September, and then maybe November or December. I think four times in one year is what I want.

Despite turning 50 last month, Bernard Hopkins continues to maintain his interest in fighting you. Is that a fight you have any interest in?

Yeah, I respect Bernard. He is a big name and [former] titlist. But right now for me my focus is on the middleweight division. It is very important for me to have a unification fight because of who is No. 1 and who is best in the world in the middleweight division. Maybe second [goal] is a pay-per-view fight. But who is a PPV fighter? Canelo [Alvarez]? Yes, he is a PPV fighter. Miguel Cotto? Of course, he is a PPV fighter. [Julio Cesar] Chavez Jr.? Of course, he is a PPV fighter. Of course for Bernard, I understand his situation right now. I'm ready for everybody. I'm open for everyone.

Did it surprise you how easily you took apart Marco Antonio Rubio in your last bout?

I want to say thank you very much for my coach, Abel Sanchez. He taught me the original Mexican style because I want different punches and more experience than just my power, speed and timing. It's not just power punches. And of course [against Rubio] it wasn't just one punch. If you see closely before the last punch, I tried a combination with a right hook.

What is the most important thing you want to accomplish in 2015?

For me, it's very important, and I want a unification fight. This is my focus: Who is No. 1? Right now I have WBC interim [title]. The next fight I want to be fighting who? Miguel Cotto, he is the regular WBC champion. I want the WBC belt, and of course WBO or IBF. I want all the belts.

Every time you do a postfight interview it seems another catchphrase is born, whether it be "Good Boy" or "Mexican Style." How does it make you feel to see your fans take to you in this way?

[He laughs.] I don't know, this is just my situation and this is my life, not just for right now but probably in the future.

When are we going to see them all on T-shirts, with all of your fans wearing "Good Boy" written across their chests?

This is great idea, a great idea. [He laughs.] I just have big praises for my fans and everybody. This is cool, this is cool. And good fun.