Mikel Arteta launched a never-seen-before Arsenal experiment in their defeat to Nottingham Forest - but it's not one that he will likely want to repeat.
Aiming to keep his side's fleeting title chances alive in the East Midlands, the Spaniard deployed orthodox midfielder Thomas Partey in defence. Essentially, the system saw the Ghanaian move into a central position when the Gunners were in possession of the ball.
Without it, he appeared to slot into the backline on the right-flank. It is a role that he had never served for Arsenal before but that does not mean that he was a complete novice.
