PTS (Points): The total amount of points that your team has accumulated since the start of the tournament.
PCT (Percentile): The percentile your performance falls within, graded against all other entrants in the game.
RK (Rank): Your numerical rank in the entire field of entrants.
As participants of Tournament Challenge, your goal is to get your numbers in those categories to be as high as possible. The higher that your PTS, PCT or RK are, the better you are doing in picking the winning team in each matchup. Check your standing on the Leaderboard.