Who wins?
Yankees-Red Sox vs Federer-Nadal
Federer-Nadal wins 89% to 11%. 23 more put them in the same row. From Famous Sports Rivalries Tier List. Pick a side.
chunky_wizard on Yankees-Red Sox: the 2004 ALCS and A Rod vs Varitek, peak hatred
FrozenPanda1947 on Federer-Nadal: 40 matches, the 2008 Wimbledon final in the dark is the greatest match ever played
Famous Sports Rivalries Tier List: the full ranking