Dennis Siver is coming off of the most impressive performance of his career. This isn't necessarily because it was the most dominant, but because it came against the highly skilled George Sotiropoulos.
The German kick-boxer was able to hand Sotiropoulos his first loss inside the Octagon—and end any title shot hopes as well.
His previous fight against Andre Winner also showed signs of his development, as he earned his first "Submission of the Night" bonus after a rear-naked choke finish in the first round.
According to the USA Today and SB Nation Consensus Rankings, Dennis Siver is listed at No. 15 in the Lightweight Division. Unfortunately, a win over the un-ranked Matt Wiman doesn't do much for his title hopes. Ideally he'd get a shot at someone like Ben Henderson or Anthony Pettis, with a win.
Still, Siver is probably three more wins away from a title shot. Wiman isn't a big name in the division and it is unlikely that he'll go into a No. 1 contenders bout with a win over him. It's more likely that an additional win over a Top 10 ranked opponent will get him there.
The question about Siver is his ground game and wrestling ability.
Everyone is aware that he can strike, but the only time he's had to defend takedowns recently was during his bout against Sotiropoulos—who isn't known for his wrestling. While he did finish Winner on the ground, it was after knocking him down—and again, Winner isn't known for his Brazilian jiu-jitsu.
It's possible that Siver can contend for a title shot, but he'll have to continue to evolve in the grappling realm because the top guys in the division—Frankie Edgar, Gray Maynard and Jim Miller—all have great wrestling backgrounds.