Joey Barton turned teacher this week to educate his Bristol Rovers players about the finest defenders in football history.
Everyone from Franco Baresi to Sergio Ramos was covered in the lesson but sadly his pupils were only half paying attention.
The Sunderland winner scored by Aiden O’Brien that keeps them in touch with the automatic promotion places in League One came from defending at a corner that could be generously described as soft.
In fairness to Rovers, who slipped a place to 23rd but retain decent hope of survival, their back line were courageous in withstanding a barrage of pressure that came thereafter.