Agnishwar is a breast stroke swimmer having illustrious career spanning to over 18 years. He is the 1st Indian youngest Swimmer to hold National records in 6 swimming events. Agnishwar is the only swimmer from Tamil Nadu to ever win Asian age group Gold medal (2007). He is the only Indian swimmer ever to win 6 Gold medals at South Asian Games, Pakistan 2007. He is the only Indian swimmer to qualify for the Finals of FINA world cup in 5 different events in 2011.
