Arsenal teenager Glen Kamara got stuck in during training, giving Alexis Sanchez the run around.
Kamara, 19, is a Finland born defensive midfielder who has been involved in Arsene Wenger's sessions previously, but is yet to earn a first team start.
Being able to mix it on a regular basis with world renowned stars like the Chilean, will no doubt be of benefit for his experience and self confidence.
The youngster has made eight appearances for Arsenal's under-21 side this season, scoring once.
He was not the only teenager to get stuck into training on Tuesday, with German youngster Serge Gnabry perhaps taking it a bit too literally with a robust challenge on England winger Theo Walcott (below).
The competitive sessions bode well for Arsenal, as does involving young members and fringe members of the squad and helping their development.
Gnabry was a breakthrough player last season, but injury has kept him out almost the entire 2014/15, restricted to only under-21 games. He is clearly champing at the bit to get going once again, but at this crucial stage of the season, getting minutes will not be easy.