Former UFC welterweight champion Matt Serra at UFC Unfiltered Podcast named two men, who, in his opinion, may cause problems for lightweight champion Khabib Nurmagomedov.
"The first is Brian Ortega. I do not care who is saying and what. It was a very powerful guillotine (from Poirier), and if in his place was a more technical and stronger fighter like Ortega, he would have finished the job.
The second is Justin Gaethje. Who was able to hold him and beat him? Nobody. He is so strong that cardio was never a problem for him. His has powerful kicks, as well as excellent punches."