Arsenal boss Mikel Arteta is wary facing struggling West Ham on Sunday.
Arteta says he has total respect for Hammers boss David Moyes, his former Everton manager.
He said, "I think more than respect it's admiration. I loved playing for him, I would go through a brick wall for him when he was my manager and i think everybody would in that squad. A really good coach. Exceptional at managing the group and dealing with individuals and then a very special person.
"A really special human being. Very trustworthy and a man who honours his word. He always did it and someone who I learned a lot from. He saw things in me I didn't know and asked me to play in positions I never played before in my life."
On the Hammers, Arteta said: "It's a very difficult game. We've been there a few times. We always find them to be tricky and difficult games. So it is going to be a fight and another big derby for us. We will need to be at our best to win."