It was once known as plain old closing down, but coordinated pressing schemes have become one of the key tactical battlegrounds at the sharp end of the Premier League.
The Dons forward impressed in last weekend's Scottish Cup semi-final, but he was once left blown away by the talents of a former Los Blancos defender he once starred alongside.
Barcelona have a score to settle but Stamford Bridge will be ready as Chelsea look to reach the Women’s Champions League final in Hayes’s final season