'I am ready to follow him everywhere,' Ander Herrera said to Jose Mourinho before Manchester United's 2-0 win over Chelsea in 2017 - detailing his plan to stop Eden Hazard. 'If he wants to go to the bathroom, I will go with him.'
The Spaniard is fondly remembered for his relentless man-marking of the talented Belgian three years ago, and it summed up who he is as a player - and why United fans still speak so highly of the midfielder to this day.
Tenacious in the tackle, technically sound and willing to leave nothing on the pitch come the final whistle - he is a manager's dream.