Modified and miniaturized as it is, a mashup of disparate sports that entertains Minnesota United players before and after training sessions is all about what drives them on gamedays.
"It's all about competing," United veteran defender Michael Boxall said.
Only this competition they call "soccer tennis" looks more like volleyball played with the feet and head, and it comes dripping with laughter and trash talk.
The spirited 2-on-2 games — and occasionally 1-on-1 — feature a thigh-high net and plastic markers that outline a small grass court where participants refine their touch and ball skills, creativity and teamwork.
As with volleyball, a serve on the 6-by-6-yard court must bounce on the opponent's side before it's returned. Like volleyball, there's a limit of three times playing the ball with the feet, knees or head before a ball is sent back over the net, either softly or with a kill shot.
Lacking from the game they play professionally is another 95 yards and supervision. First side to 11 points wins, must win by two.
"There's a lot of opinions, you know?" United goalkeeper Vito Mannone said. "We don't have a ref, and that's a problem."
They play mostly at the beginning and end of training sessions on days before or after games. Gifted scorer Darwin Quintero is considered top class in soccer tennis as well. Mannone and midfielder Jan Gregus are the most dedicated and a pair.