Question: Who directed a 2015 American sports drama film that was a spin-off and sequel to the "Rocky" film series, the film features a British professional boxer who held the WBC cruiserweight title from 2016 to 2017? 
Sentence (from "Creed (film)"): Creed is a 2015 American sports drama film directed by Ryan Coogler and written by Coogler and Aaron Covington.
Relevant evidence: Yes