Much was made over the dismal 4th innings scores at Galle, ergo
winning the toss was a huge advantage. Your mission, should you be
prepared to accept it, is to list by ground, the % of toss winners
who've won the game over say, the last 12 Tests played there. And
because of the El Zimbangle Effect on stats, I'd suggest that Tests
involving these two countries be excluded.
alvey