Karan Rastogi (born 8 October 1986) is an Indian tennis player, who also represented Hong Kong in international competitions.

He was then selected to be part of the Indian Davis Cup team for the first time against New Zealand in February 2004.

This was the year he played his first live match in Davis Cup against Uzbekistan as India's no.1 singles player.

In 2012 November Karan joined forces with the Hong Kong Tennis Association to coach and help all their national teams.

In 2016, Karan made a comeback to playing and represented Hong Kong as a player for the first time in Davis Cup and won both his singles and doubles matches against Lebanon to win promotion for Hong Kong from Group 3 to Group 2.