Crosstrain Fight Club is Delhi's premier MMA club founded by Siddharth Singh, a top-ranked competitive grappler.

Crosstrain Fight Club is the best MMA club in Delhi, founded by Siddharth Singh, a highly decorated professional fighter and the first Competitive Black Belt in Brazilian Jiu-Jitsu in India. With accolades including 16 Khan Grading 'Kru', Gold Mongkol 'Master' in Muay Thai, and being India's highest-ranked competitive grappler (ranked 4th in Asia and 11th in the World at the AJP Pro Jiu Jitsu circuit in 2022), Siddharth brings extensive experience in Holistic Fighting Systems to the club. The facility offers classes in Brazilian Jiu-Jitsu, Mixed Martial Arts, Muay Thai, Wrestling, Boxing, and Women Self Defence. It is recognized as India's first home for a Jiu-Jitsu Black Belt and a Road to UFC champion. The club emphasizes a safe, secured environment with top-class faculty to help students upgrade their lifestyle. As India's top MMA fight club, it provides opportunities for students to learn from experts who have backgrounds ranging from the Doon School boxing team to an MSc in Economics and Strategy from St Andrews College, Scotland, and work as a Regional Business Manager in London.