Otto Wallin has claimed he doesn't "care too much" about Anthony Joshua's jibes ahead of his fight with Tyson Fury.
The Gypsy King will take on unbeaten southpaw Otta Wallin in Las Vegas on September 14.
Wallin is currently 20-0, but his 20 opponents have racked up a combined 259 losses.
Joshua, who has previously sparred with Wallin and beaten twice at an amateur level, branded the 28-year-old a "lower-tier heavyweight" in a criticism of both Fury and his challenger.
"I don't care too much," Wallin told BBC Sport. "He probably means I haven't been at that elite level. I haven't been at the elite level in fights but I have sparred big names and know I am at their level - Anthony Joshua, Kubrat Pulev, Adam Kownacki, Jarrell Miller, all different guys, and I know I am on this level.
"I am not worried about that, it's just that people haven't seen. Anthony knows I am a good fighter. Yes, it helps a little with motivation. I have no pressure at all - I can only go in there and do my best. This is the moment I have been dreaming of since I started boxing when I was 15. I have been preparing for this. Now it's just I am fighting the best I have ever faced.
"I am fighting probably the best heavyweight out there, at least the best boxer. He is a big guy, uses his size well. He is very skilled and can do a lot of things in there. He is tricky and has beaten good fighters but there are some things that people haven't done to him. I am really confident in myself and my work ethic. I have worked for a long time and dreamed of this moment. Now it is finally here and I have to try and grab it with both hands."