Rod Stewart recently took to Instagram to share a vintage photo of him and Elton John in their soccer ... and best rock stars ever training for football together,” wrote another.

As two British pop stars enjoying the height of their fame in the 1970s, Elton John and Rod Stewart often ... John said he and Stewart had “wonderful memories” together.

("I've got eight all together. I didn't have a television," he joked, then added, "Ugly, all of 'em!”) There are some hazy truths out there about Rod ... long. Stewart and Elton John are great ...