Ex-India batter Mohammad Kaif opined that Kolkata Knight Riders (KKR) should groom India batter Rinku Singh as a future captain. "Rinku is an all-format player. Although he isn't part of...Test team, he can bat well in all formats...that guy is ready and captains Uttar Pradesh," he said. "He has the mental strength to handle captaincy and batting together," he added.