Previous Players Coached: Agnieszka Radwanska (2011-2018)
- Coach Agnieszka Radwanska to a career-high of World No.2. While Radwanska never won a Grand Slam, she reached the finals of 2012 Wimbledon (l. S. Williams) and the semifinals of four additional Slams
- After taking a break from coaching on the WTA Tour, Wiktorowski joined Iga Swiatek's team as coach in 2022
- Swiatek and Wiktorowski's partnership led to a historic season which saw Swiatek win 37 matches in a row (the most this century by a woman) and lift two Grand Slam titles (Roland Garros 2022; US Open 2022)
- Swiatek also won four 1000-level titles (Doha, Indian Wells, Miami, Rome) and reached the ranking of World No.1. She would finish the season as Player of the Year
- Wiktorowski coached Swiatek to a fourth Grand Slam title at Roland Garros 2023