Question: Which tennis player received a higher world singles ranking, Fabio Fognini or Marin Čilić?
Sentence (from "Fabio Fognini"): Fognini's most successful surface is red clay, upon which he won his four ATP singles titles in Stuttgart, Hamburg, Viña del Mar and Umag, reached the quarterfinals of the 2011 French Open and the semifinals of the 2013 Monte-Carlo Masters.
Relevant evidence: No