Tennilä Otto (born March 20, 1993 in Helsinki, Finland) is a Finnish athlete, player of the Finnish table tennis team. A participant in two World Championships and three European Championships as part of the national team, he became the bronze medalist of the 2012 Northern European Championship as part of the Finnish national team. He is a 5-time Finnish doubles champion. At club level, Tennilä has won 5 Finnish Higher League titles. He is best known for being one of the contributors to the popular table tennis channel Pongfinity.