Selected research. Full list can be found on Google Scholar. Kovalchik, S. A., & Ingram, M. (2018). Estimating the duration of professional tennis matches for varying formats. Journal of Quantitative Analysis in Sports, 14(1), 13-23. Kovalchik, S., & Reid, M. (2018). A shot taxonomy in the era of tracking data in professional tennis. Journal of sports sciences, 36(18), 2096-2104. Albert, J., & Kovalchik, S. (2017).