More lines, and a few hints:
I used to be a heart beating for someone
But the times have changed
The less I say the more my work gets done
The song was a #1 US hit in 1975 for a well known English songwriter, singer, and pianist.
The timing, title, and lyrics suggested that perhaps the song was written for the U.S. Bicentennial, to be celebrated in 1976. But, according to Wikipedia, it actually had more to do with the singer’s desire to dedicate a new song to a female American tennis star he had recently befriended. The title of the song was the same as the name of the professional tennis team of which she was a member.