Morgan Schneiderlin has played under the Koeman brothers at both Southampton and current club Everton, and has clearly been attempting to get one up on them throughout that time.
In training on Tuesday he finally managed it - but admits he could soon be made to regret it.
In a video posted to Everton's official Twitter page on Tuesday, as they players and coaching staff walk off the training pitch, Schneiderlin manages to execute a cheeky panna on Erwin Koeman, assistant manager and brother of boss Ronald.
Scroll down for video.
The former Manchester United midfield is casual about it, knocking the ball between his feet for a few seconds while waiting for Erwin to catch up.