"Country coefficients 2017/18". UEFA.com. Union of European Football Associations. 4 May 2018. Archived from the original on 11 May 2018. Retrieved 4 May 2018.
"Club facts: Liverpool". UEFA.com. Union of European Football Associations. 2 June 2017. Archived from the original on 27 May 2018. Retrieved 26 May 2018.
"Tottenham v Dortmund background". UEFA.com. Union of European Football Associations. 21 January 2019. Archived from the original on 13 February 2019. Retrieved 9 May 2019.
"Country coefficients 2017/18". UEFA.com. Union of European Football Associations. 4 May 2018. Archived from the original on 11 May 2018. Retrieved 4 May 2018.
"Club facts: Liverpool". UEFA.com. Union of European Football Associations. 2 June 2017. Archived from the original on 27 May 2018. Retrieved 26 May 2018.
"Tottenham v Dortmund background". UEFA.com. Union of European Football Associations. 21 January 2019. Archived from the original on 13 February 2019. Retrieved 9 May 2019.