Terry, a former Chelsea captain, has been critical of the zone marking system. He believes it diminishes individual responsibility among defenders and prefers a more traditional man-to-man marking approach. The criticism gained momentum after Chelsea's loss to Brentford, with Terry pointing out the team's defensive positioning and stating that the opponent exploited the spaces during the game. He also stated that the zone marking system makes it unclear who is marking the opponent when the ball is played over the first line of defence. The former captain also mentioned that the team was exposed in the second half, allowing Brentford to capitalize on the weaknesses.