                             sentence 1: at best ; Davydenko"'s-siipporters were  ively ignorant of tennis etiquette ; at worst ; they  cheated: - yet went without penality from ‘umpire  Lars Graf. ~    sentence 2: At best , Davydenko 's supporters were  ively ignorant to tennis etiquette st worst , they  cheated ~ = yet wentimpeilived by iter eo