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)"): A spin-off and sequel to the "Rocky" film series, the film stars Michael B. Jordan as Adonis Johnson Creed, Apollo Creed's son, with Sylvester Stallone reprising the role of Rocky Balboa.
Relevant evidence: No