UFC Fight Night: Rafael Fiziev continues hot run in fifth-round KO of ex-champ Rafael dos Anjos

UFC Fight Night: Rafael Fiziev continues hot run in fifth-round KO of ex-champ Rafael dos Anjos

LAS VEGAS -- Rafael Fiziev proved to be one step ahead of Rafael dos Anjos over the course of four lightweight rounds on Saturday

And then in the fifth, he put the former champion away for good measure.

Fiziev (12-1) continued his ascent of the UFC's lightweight rankings with a blistering, left hook knockout 18 seconds into the final round

 The victory, which headlined UFC Fight Night inside the Apex, extended Fiziev's win streak to six

After the fight, Fiziev, who is notorious for his refusal of calling out any future champion, called for tennis' superstar Rafael Nadal.

"Now we know who the best Rafael is in the UFC," Fiziev said. "Now we know,

and now I want to make a challenge: Who is the best Rafael in the sport? Rafael Nadal, come here."

Fiziev, 29, might not be comfortable calling other fighters out, but he has no issue when it comes to facing them in the cage

His performance on Saturday was efficient and violent, as it has been throughout his career

Representing the country of Azerbaijan, Fiziev worked dos Anjos' body with kicks and boxing combinations throughout all five rounds

Dos Anjos came out aggressive in the fifth, which played directly into Fiziev's hands. Referee Mark Smith stopped the bout as soon as Fiziev connected the left

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