Losing someone like Kohli is very hard from Indian Test team's point of view, says Karthik
New Delhi, May 12 (IANS) Former India wicketkeeper-batter Dinesh Karthik said Virat Kohli announcing his retirement from Test cricket is a massive loss from an Indian Test point of view, as he was the one who defined how the longest format of the game should be played and valued by the players.