He also posted a pic directing fans to his website to listen to the song with a simple message: "TKO is out now."
With an extra emphasis on the now!
The lead-up to the release of "TKO" featured several photos and quick clips of the song on Timberlake's Instagram account.
In one quick clip, the teaser ended with Timberlake singing "you knock me out."
The entertainer also added a few photos, including a shot in the studio, behind the mic, with the simple message: "Get ready... #The2020Experience #2of2 #youneverknow." He also posted a pic of a note asking his fans, "should I release a new single today?"