Mowatt, Todd (March 1, 2001). "Knockout Kings 2001 (PS2)". The Electric Playground. Greedy Productions Ltd. Archived from the original on June 22, 2002. Retrieved March 7, 2024.
Blache III, Fabien (October 31, 2000). "Knockout Kings 2001 (PS)". IGN. Ziff Davis. Archived from the original on March 28, 2023. Retrieved March 6, 2024.
Perry, Douglass C. (February 8, 2001). "Knockout Kings 2001 (PS2)". IGN. Ziff Davis. Archived from the original on October 29, 2022. Retrieved March 6, 2024.
Hager, Dean; Leahy, Dan; Kujawa, Kraig (April 2001). "Knockout Kings 2001 (PS2)"(PDF). Electronic Gaming Monthly. No. 141. Ziff Davis. p. 107. Archived(PDF) from the original on July 16, 2023. Retrieved March 6, 2024.
Air Hendrix (April 2001). "Knockout Clings to Title on PS2"(PDF). GamePro. No. 151. IDG. p. 96. Archived from the original on February 7, 2005. Retrieved March 7, 2024.
Hager, Dean; Leahy, Dan; Kujawa, Kraig (April 2001). "Knockout Kings 2001 (PS2)"(PDF). Electronic Gaming Monthly. No. 141. Ziff Davis. p. 107. Archived(PDF) from the original on July 16, 2023. Retrieved March 6, 2024.
Mowatt, Todd (March 1, 2001). "Knockout Kings 2001 (PS2)". The Electric Playground. Greedy Productions Ltd. Archived from the original on June 22, 2002. Retrieved March 7, 2024.
Blache III, Fabien (October 31, 2000). "Knockout Kings 2001 (PS)". IGN. Ziff Davis. Archived from the original on March 28, 2023. Retrieved March 6, 2024.
Perry, Douglass C. (February 8, 2001). "Knockout Kings 2001 (PS2)". IGN. Ziff Davis. Archived from the original on October 29, 2022. Retrieved March 6, 2024.
Air Hendrix (April 2001). "Knockout Clings to Title on PS2"(PDF). GamePro. No. 151. IDG. p. 96. Archived from the original on February 7, 2005. Retrieved March 7, 2024.