UFC light heavyweight champion Jon Jones has turned back the attempts of Vitor Belfort, Chael Sonnen, Rashad Evans, Quinton “Rampage” Jackson and Lyoto Machida since securing the belt from Mauricio “Shogun” Rua.

The name Alexander Gustafsson, though, is one that seems to lead many to believe Jones’ reign atop the division could be coming to an end.

Jones and Gustafsson will meet in September at UFC 165, and “The Mauler” has the size, skills and youthfulness to compete with “Bones” – at least to many out there.

“I am working hard,” said Gustafsson, during a stop on the recent UFC World Tour. “Everything is going well. I am doing my homework and I will be ready.

“(This fight) is all about working hard. It will come down to who is working the hardest.”

While Gustafsson doesn’t have the kind of resume to match Jones, he did best Rua in his last fight. And, he owns a win over Matt Hamill – the only fighter to defeat Jones, though it came via disqualification in a match the champion was ready to finish.