If you have been following Khabib's success thanks mainly to his incredible grappling ability in the UFC's lightweight division, take a look at this graph, showing the top 15 ranked UFC lightweight fighters at this time.
Khabib has a perfect record which translates into a straight line in terms of cumulative wins on the x-axis.
What is most curious is just how many fights Donald Cerrone has had and that he is still in the top-15, albeit barely so and probably not for long given the talk of his retirement.
Below are the % of wins out of total fights for each top ranked fighter as well.
Donald Cerrone result 0.679245 Drew Dober result 0.696970 Gregor Gillespie result 0.928571 Islam Makhachev result 0.947368 Beneil Dariush result 0.791667 Kevin Lee_(fighter) result 0.750000 Al Iaquinta result 0.666667 Carlos Diego Ferreira result 0.894737 Paul Felder result 0.772727 Charles Oliveira result 0.763158 Conor McGregor result 0.846154 Dan Hooker result 0.689655 Tony Ferguson result 0.862069 Dustin Poirier result 0.787879 Justin Gaethje result 0.916667 Khabib Nurmagomedov result 1.000000 dtype: float64