Which tennis player received a higher world singles ranking, Fabio Fognini or Marin Čilić?
Fabio Fognini: Fabio Fognini (] ; born 24 May 1987) is an Italian professional tennis player who is currently ranked world No. 29 in men's singles by the Association of Tennis Professionals (ATP) and the current Italian No. 1. Marin Čilić:  His career-high singles ranking is world No. 5, achieved in September 2017.
i don't know