Having recently split ways with 12-time Grand Slam champion Novak Djokovic, whom he coached for nearly three years, tennis great Boris Becker told NDTV on Friday that he had 'an unbelievable time' working as the coach of the Serbian star. "It was amazing while it lasted. I had an unbelievable time, he won all the tournaments that he wanted to win," he said. On Djokovic's announcement that he is not looking for a new coach to replace Becker, the German legend joked, "How can you replace me anyway? Come on!"