London, June 17 -- Former wicketkeeper batter Dinesh Karthik believes India head coach Gautam Gambhir is tactically "very good," but he feels man management remains an area he would examine.

While Gambhir extended India's dominance in limited-overs cricket, red-ball cricket remains a format in which he has yet to establish supremacy. In his first Test assignment, India convincingly won against Bangladesh but lost the plot against New Zealand and Australia.

India was pummelled by the Kiwis on home turf to a historic 3-0 whitewash. This was followed by a collective failure to retain the Border-Gavaskar Trophy against Australia for the first time in a decade, which was topped up by agonisingly crashing out of the World Test Championship ra...