Celtic were the winners of the Scottish Premier League in 1915.
Celtic won the Scottish League Cup in 1915.
The Scottish League Cup competition wasn't established until 1946.
Everton was the winner of the English Premier League in 1915.
There was no the Belgian League competition in 1915.
Sparta Rotterdam were the winner of the Eredivisie league in 1915.
The Italian League winners of the year 1914 were Genoa CFC.
The league suspended play from 1915-1919 due to World War I.
The Copa del Rey champion was Athletic Bilbao.
There was no competition held due to World War I.
The KIF were the winners of Veikkausliiga in 1915.
Odd Grenland were the winners of the NM Cupen in 1915.
The winners of the Austrian Bundesliga in 1915 were Wiener AC.