Jeff and Carl celebrate the final match of the ATP season, the Tour Finals championship match between Daniil Medvedev and Dominic Thiem. We discuss Medvedev's tactical savvy and physical versaility, along with over- and under-rated parts of Thiem's game. Also on the agenda: Are Medvedev and Thiem a clear "second group" behind Djokovic and Nadal but ahead of the rest of the pack? Will Medvedev have a better career than Alexander Zverev or Andrey Rublev? What constitutes tactical perfection? How could we measure it? Are we biased toward all-around players when listing the strongest tacticians? Is it possible for a 30-stroke rally to be tactically strong?