"Runner" is the first new track from Tennis since their 2017 EP We Can Die Happy.

Vocalist Alaina Moore says of their new single, ""Runner" is the first song we wrote for our new record. It began as a guitar riff Patrick recorded while we were living off grid, anchored in a fisherman’s cove called San Juanico. The only instruments we had on board were an acoustic guitar and a drum sequencer, but the limitations seemed to work in our favor."

Moore adds of their follow up to 2017's Yours Conditionally, "Until that point we had no clear vision for our writing. The demo we recorded that day outlined the sound of our future, the first contours of our fifth full-length, called Swimmer, out February 14, 2020."