The fate of matches is decided by smaller battles taking place on the field. Berti Vogts doing a job on Johann Cryuff in 1974, Claudio Gentile shackling Maradona in 1982 or Lev Yashin pulling off one save after another to deny Brazil’s legendary forward line in 1958….world cup games have often been decided by such key clashes. THT’s Somnath Sengupta takes a look at the potential clashes in group games for 2010 world cup.