"Met Chhattisgarh CM Dr Raman Singh in Gandhinagar," Modi said in a tweet and also posted a picture of his meeting with Singh.
Sources said the post-poll strategies were discussed during the meeting.
Like Modi who had led BJP to victory in Gujarat assembly polls in three consecutive terms, Singh too steered his party to score a hattrick in Chhattisgarh in assembly elections.
Singh, amid reports of infighting in BJP in Chhattisgarh, had backed Modi to hilt in the latter's prime ministerial bid.