The 40-year-old Tendulkar walked into the sunset after the Mumbai Test against the West Indies, which ended in less than three days today.
The Prime Minister personally called the batting icon and wished him well for the future.
But there was a minor glitch before the pleasantries were exchanged. Apparently, Tendulkar's phone was so busy due to an outpouring of wishes that he was unaware that Singh had been trying to call him.
Singh then got in touch with BCCI vice-President Rajeev Shukla, who is also a Congress MP, to get through to Tendulkar. Shukla told Tendulkar to be available for the call from the top office.