The upcoming World Test Championship will feature jersey numbers behind the white shirts for the first time but there are two numbers that the Indian team is unlikely to use during the Test series against the West Indies in Antigua starting August 22.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/india-in-west-indies/with-no-dhoni-in-tests-will-india-use-jersey-no-7-at-world-championship/articleshow/70363673.cms