Leeds United boss Marcelo Bielsa is impressed by the attacking depth of Chelsea.
Leeds managed to keep the Blues at bay for Saturday's 0-0 draw.
Bielsa reflected: "What makes a team like Chelsea so fearful is that for their four positions in attack, the two wide men, the striker and one that plays behind - they are able to count on two players for each of these positions.
"The most difficult thing in football is positions in attack. They are the players who are most substituted. When you have four of those players on the field and can count on four more to bring on, it's not easy to face these teams. We made a big, big, big effort so that the game would not become unbalanced. It was with a slight pre-domination from us in the second half and more clear dominance from them in the first half.
"But the offensive production of each team was similar and this is very difficult to achieve. If you take, for example, the last game they played before they played us, the first proper chance that Chelsea conceded in that game was the 90th minute. So for us, to have provoked five or six occasions on goal has its merit."
