Question: how many games are played in a round robin tournament?
Answer: For instance, a tournament of 16 teams can be completed in just 4 rounds (i.e. 15 matches) in a knockout (single elimination) format; a double elimination tournament format requires 30 (or 31) matches, but a round-robin would require 15 rounds (i.e. 120 matches) to finish if each competitor faces each other once.