For players active prior to the introduction of the Champions League in 1992, see: Di Maggio, Roberto; Mamrud, Roberto; Rota, Davide; Owsianski, Jarek (8 June 2017). "Champions Cup/Champions League Topscorers". Rec.Sport.Soccer Statistics Foundation (RSSSF). Retrieved 2 November 2017. For all other players, see: "UEFA Champions League Statistics Handbook 2017/18: Facts and figures"(pdf). Union of European Football Associations (UEFA). p. 11. Retrieved 2 November 2017.
Source (unless otherwise indicated): UEFA Champions League Statistics Handbook 2018–19. For players active prior to the introduction of the Champions League in 1992, see "All-time records 1955–2018"(pdf). UEFA.com. Union of European Football Associations (UEFA). pp. 4–8. Retrieved 3 October 2018. For all other players, see: "Facts and figures"(pdf). UEFA.com. Union of European Football Associations (UEFA). pp. 7–8. Retrieved 3 October 2018.
"Lionel Messi and Cristiano Ronaldo goal for goal". UEFA.com. Union of European Football Associations (UEFA). 18 April 2017. Retrieved 19 April 2017. Ronaldo: Debrecen 3-0 (h) 09/08/05, UEFA Champions League third qualifying round
For players active prior to the introduction of the Champions League in 1992, see: Di Maggio, Roberto; Mamrud, Roberto; Rota, Davide; Owsianski, Jarek (8 June 2017). "Champions Cup/Champions League Topscorers". Rec.Sport.Soccer Statistics Foundation (RSSSF). Retrieved 2 November 2017. For all other players, see: "UEFA Champions League Statistics Handbook 2017/18: Facts and figures"(pdf). Union of European Football Associations (UEFA). p. 11. Retrieved 2 November 2017.