Jorge Sampaoli has inadvertently revealed Argentina's tactical work on the training ground ahead of their critical World Cup showdown with Nigeria next week.

Just days after England assistant Steve Holland seemingly leaked their lineup for Sunday's clash with Panama, the South American side almost followed suit, the Daily Mail reports.

But instead of revealing the XI for the must-win clash in Saint Petersburg on Tuesday, Sampaoli's notebook shows detailed plans from their training camp.

Anyway this is clear coaches have to be careful during open training sessions as their information can be poached by big-lense 'spies'.

Argentina training before Nigeria
English side for Panama game