Close, but not quite right. Man Utd lost about 15 games in 68/69.
The correct answers is teams that have done the league double against the reigning European Cup/champions league holders.
(have rechecked and there are in fact 10 teams)
Chelsea
Tottenham
Ipswich
Leicester
Sunderland
Everton...
? Is that your answer or are you seeking clarification? If it's your answer then that was in fact the title of the thread!
If it's clarification, then it relates to winners of the Uefa Champions League and its forerunner, the European Cup.
And just to clarify the clue, when I say 'we done...
Question relates to the English clubs.
9 clubs have done it, 2 of which have done it twice.
Of the 12 occasions that English clubs have won it, this event has failed to occur on 3 occasions.
Of the 9 clubs, only 2 have actually won the competition.
What is the event and can you name the 9 teams?