Kallista is also active in sports. She is a member of the Junior Tennis Champions Center (JTCC) 10-and-under advanced team. Recently she was awarded first place with her 10 and under team from JTCC at the 2014 Stars of Tomorrow Junior Challenge held at the William H. G. Fitzgerald Tennis Center. The event, hosted by DC Parks and Recreation, is in its fifth year of competition. It showcases the best young star tennis players in the area.
- State Winners (performed 7-9 memorized pieces): Susan Kim, Kevin Chen,
- District Winners (performed 4-6 memorized pieces): Kallista Liu, Nicholas Emig, Cadence Cheng, Sean Cheng, Charlize Lee,
- Local Winners (performed 2-3 memorized pieces): Shishir Nallar, Alicia Scott, Samaira Hammond, Emily Houk, Sydney Smith, Marlon Brown, Grace Lowden, Amaya Collins, Danielle Spence, Erin Lee, Soraya Sharif, Hunter Gmahl, Ayana Togba, Sydney Barnes
- Pledge Winner (performing 1 memorized piece): Blake Edwards