Can anyone tell me the name of this song or who composed it? Follow this link:

YouTube - The 13 Grand Slams of Roger Federer

Sounds like the last half of the song, Lux Aeterna

Thanks to Toobar4u and FolkFury, I found out the origin of this song. The name is "Lux Aeterna," which means eternal light in Latin. It was composed by Clint Mansell and performed by the Kronos Quartet for the movie "Requiem for a Dream." They made a remix for the movie "LOTR: The Two Towers." There's a full orchestra version which is the one that I needed the name for. Thanks.