Season Tiebreak-Win-Pct Leaderboard

Share of tiebreaks won per player, from real match_sets rows joined to matches in the season. Set rows are stored from the match winner side, so a tiebreak goes to the winner side when winner_games > loser_games and to the loser side otherwise; a 7-6 set without tiebreak point columns counts the same way (the /h2h tiebreak_record predicate). Super tiebreaks (10-point match tiebreaks) are excluded: this board rates classic 7-point tiebreak play. Only players contesting at least 10 tiebreaks qualify (ATP 2026: 361 eligible; WTA 2026: 13 eligible). No defaults, no estimates: a player with no tiebreak sets simply does not appear.