Unbeaten middleweight Anthony Ogogo says he cringes watching his old fights because of how injury affected his performances in the ring.
"I've had good performances, but from my perspective I've looked back at old fights and I have cringed," he said.
"I'm thinking 'I missed an opportunity there' and the reason I wasn't doing it was because my Achilles was so sore."
He told BBC Radio Suffolk: "But when I'm back now I'm going to be explosive, monstrous and tenacious and show the world how good I really can be."
Ogogo is set to return to the ring after a 12-month absence on Saturday, 18 July in Berlin against an as yet unnamed opponent.
The fight comes after the former junior world champion announced he will be joint-promoted by Oscar De La Hoya's Golden Boy Promotions and German organisation Team Sauerland from now on.
|Ogogo's professional record|
He is looking forward to ending his long absence from the sport, saying: "I can't wait. It's so exciting and I've got a massive grin on my face.
"The prospect of getting back into the boxing ring and doing what I love to do is coming.
"I'm boxing in Germany because it was the earliest opportunity I was able to box. It's going to be a massive show as well: Arthur Abraham v Robert Stieglitz. That's every bit as big as Carl Froch v George Groves over here.
"But what's most important it the return of Anthony Ogogo. I'm going to do everybody proud; it's my first step back to greatness."