Every Champ's Biggest Achilles' Heel

The UFC is currently ruled by the champions of all nine weight divisions they host. From women's bantamweight to heavyweight, each champion has proven to be a nearly unbeatable fighter.

Whether it's Georges St. Pierre and Anderson Silva, who have held the title for years, or Jon Jones and Benson Henderson, who are young champions, the UFC is home to the world's best fighters. They rule their divisions with an iron fist.

However, no fighter is perfect. Here is each champion's Achilles' heel.

Ronda Rousey: Striking

Ronda Rousey is undefeated. In fact, she has never left the first round.

However, something we have yet to see is Rousey do much on the feet. The champion is a judoka who uses takedowns and submissions to dominate her opponents.

Most seem to think that the fighter to beat Rousey is Cris Cyborg. That is because she is physically imposing and has devastating striking.

Until we see Rousey hold her own on her feet, her striking remains her Achilles' heel.

Demetrious Johnson: Stopping Power

At bantamweight, Demetrious Johnson was not much of a finisher at the high levels. At flyweight, Johnson still isn't a finisher, despite dropping 10 extra pounds in weight.

Johnson's inability to finish fighters in a fight may come back to bite him. He could be cruising on his way to victory and get caught at some point, which could potentially screw him over. 

He uses his wrestling and speed, but does not possess the power to put opponents away. That's why it remains his Achilles' heel.

Renan Barao: Lack of Experience vs. Wrestlers

There isn't much to dislike about Renan Barao's game. In fact, I don't think he has much of an Achilles' heel.

If there is one thing to point at, it's that Barao has not faced a bevy of top-level wrestlers. Sure, he has fought Scott Jorgensen and Urijah Faber, but that is really it in terms of wrestlers.

Seriously though, Barao is very complete. Should he meet Dominick Cruz, I think Cruz could be in for a long night.

Jose Aldo: Cardio

Nasty leg kicks, powerful all-around striking and a solid top game: That about sums up the danger that is Jose Aldo.

Aldo has been dominant since becoming champion. Other than Frankie Edgar and Kenny Florian, no other fighters he has faced have come close to beating him.

The big knock on Aldo is that he does not have top-notch cardio. He cut a lot of weight to make 145 and has faded down the stretch in multiple fights (see Mark Hominick bout).

If a fighter with good cardio and a solid all-around game faces Aldo, he could be in trouble.

Benson Henderson: Jack of All Trades, Master of None

When you think of all the UFC champions, you can usually associate them with an elite skill. Georges St. Pierre is a dominant wrestler, Anderson Silva is a cream-of-the-crop striker and Ronda Rousey is a killer submission artist.

What can you say Benson Henderson is basically the best at in one area? I would say nothing.

Henderson is very good at everything. He can handle himself on the feet, he is great on the ground and he has a solid chin. He really is the master of nothing though.

Perhaps that is not an Achilles' heel, but it definitely hurts him a tad. Add to that he is in the shark tank that is the lightweight division, and his title is in danger at any time.

Georges St. Pierre: Chin

Perhaps saying that Georges St. Pierre has a suspect chin is not fair, but watch his fight with Matt Serra where he lost the belt. He took some solid punches, but most welterweights probably would have recovered in responsive fashion.

GSP does have good striking defense and usually puts his opponent on his back, but should somebody touch his chin, he could be in big trouble. That is especially true seeing as he fights Johny Hendricks next.

Any fighter with good power can dethrone GSP...if he can stay off his back.

Anderson Silva: Counter Wrestling

I think the equation to beating Anderson Silva is simple; it's just a matter of actually carrying it out for five rounds.

Dan Henderson was the first guy to expose Silva's counter wrestling. He only lasted one-and-a-half rounds.

Chael Sonnen almost took the title from him. A triangle choke with under two minutes left nixed that.

Obviously Silva's counter wrestling is his biggest weakness, but he always finds a way to win. Hopefully for Chris Weidman, he can expose it for all five rounds.

Jon Jones: Outside Attention

Jon Jones may be the most complete fighter in the UFC. He can strike, wrestle, submission grapple and last all five rounds.

The biggest knock on Jones is keeping it together outside the Octagon. Between a DUI and other non-MMA related news stories, Jones is constantly being viewed negatively for things he does or says.

Luckily, that doesn't translate in the Octagon. However, one day Jones's attention outside the Octagon could affect his training and mentality, which could end up costing him.

Cain Velasquez: Submissions

I wondered whether I should make Cain Velasquez's Achilles' heel his chin or his submissions. However, I couldn't put his chin because he has only been knocked out once (despite being rocked by Cheick Kongo as well).

However, I think the glaring weakness that Velasquez has is that he has no submission game that we have seen. On the ground, he prefers to pound out opponents, even when he has had chokes available. 

Perhaps he enjoys pounding people's heads on the ground instead of choking them out, but this is something that could cost him in the future. Otherwise, yes, he has a suspect chin.