The first single from Roberta Flack & Donny Hathaway was a version of "You've Got a Friend" recorded before the single release of the James Taylor version: both tracks debuted on the Hot 100 dated May 29, 1971 — marking Flack's first chart appearance — and, although Taylor's version reached #1, the Flack/Hathaway duet ascended as high as #29 and was a top ten R&B hit at #8. (The B-side, "Gone Away," was a Chapter Two track written by Hathaway.)
The second single from the duets album was a remake of "You've Lost That Lovin' Feelin'" that became a #30 R&B hit, peaking on the Hot 100 at #71.
It was the album's third single "Where Is the Love" — released in April 1972, almost a year after the album itself — that would be the smash hit, largely due to Flack having had her solo career breakthrough with "The First Time Ever I Saw Your Face".
Although Hathaway had enjoyed more solo success than had Flack prior to their teaming up, his subsequent solo career was desultory, with no high-profile success prior to his re-teaming with Flack for "The Closer I Get to You" in 1978. Hathaway had recorded two songs for a second duet album with Flack — that became the Roberta Flack Featuring Donny Hathaway album — at the time of his death on January 13, 1979.