What happened to Virat Kohli? Why did he retire from Test cricket?

Virat Kohli's retirement from Tests doesn't seem right. The man who rated Test cricket as the pinnacle of the sport and wanted to score more than 10000 runs in it, cannot retire being on the cusp of it. Yes, Kohli has called it quits from the format he loved the most, with 9230 runs after 123 matches, averaging 46.85 with 30 centuries and 31 fifties. But what happened to Virat Kohli? Why did he bring curtains down on his Test career so early? Let us explore some of the possible reasons that led to Kohli taking arguably the toughest decision of his career:

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