The Argentine is impressed by the sheer number of quality players at Jose Mourinho's disposal and is anticipating a tough encounter on Wednesday
The two clubs enter the second leg of their Champions League semi-final tie with the scores locked at 0-0 after a stalemate last Tuesday at the Vicente Calderon.
Simeone is under no illusions as to the task at hand for his troops and is anticiapting a tough clash at Stamford Bridge.
"It is clear Chelsea has a huge team because they won despite making a lot of changes," he said.
"That means we are going to play against a powerful team, something we knew. So they will make a lot of problems for us next Wednesday."
Atletico Madrid are looking to reach their first European Cup final since 1974, when they lost 4-0 to Bayern Munich in a replay at Heysel.