Riddle for the Sherlocks out there

Mycroft dashes through international waters,
He needs help from legendary quarters,
In the tragic games city, brim glasses clink in cheers,
"This one opposes me", said the man oh�hear!
On Labor day, alas his time had come,
By the Apennines, he once slipped and done.
Oh braveheart, I remember that day,
Please help Mycroft find this man today!