Chelsea striker Diego Costa is sorry seeing Petr Cech now with Arsenal.
Cech faces his old teammates in the Community Shield today.
"Petr is a legendary player who has made a huge impact in world football," said Diego Costa.
"We think a lot of him. I certainly do, as a player and as a person.
"Last season we had two top keepers. It's important to have a keeper who you know is capable of pulling off a wonder save in the event of a defensive mistake. That's the difference when you have a top-level keeper. It gives you that extra bit of confidence."