Virat Kohli will be facing the toughest battle of his nascent ODI captaincy career when holders India take on South Africa in a do-or-die virtual 'quarter-final' of the ICC Champions Trophy, on June 11. Their confidence shaken after Sri Lanka effortlessly out-batted them in a high-scoring encounter, the Indian team and Kohli in particular will be keen to ensure that South Africa are continued to be known as "chokers".