Slam count vs. peak vs. surface mastery
Tennis GOAT lists run on Grand Slam math, but the raw count hides the arguments. Surface specialists complicate it — Nadal's 14 Roland Garros titles are a dynasty on one surface, while all-surface consistency is its own claim. Era-strength debates never end (was the Big Three era harder than the 90s?). And the women's game has its own untouchable tier in Serena and Graf that any honest list keeps separate from the men. Rank by slams if you want a clean number, or by peak level if you'd rather actually watch tennis.