Celtic won the Scottish League Cup in 1917.
The Scottish League Cup competition wasn't established until 1946.
There was no English Premier League competition in 1917.
There was no competition of the Italian league in 1917.
There was no the Belgian League competition in 1917.
Go Ahead were the winner of the Eredivisie league in 1917.
The league suspended due to World War I.
The league suspended play from 1915-1919 due to World War I.
The Copa del Rey champion was Madrid FC.
The HJK were the winners of Veikkausliiga in 1917.
Sarpsborg FK were the winners of the NM Cupen in 1917.
The top scorer of the English premier League-EPL in 1917 was Ted Harper