Tierney has had to battle from several major injuries over this first 18 months with the Gunners.
He told Goal: "On the first day of my stay at Arsenal, I became close to Hector. At the first meeting, he said that in the near future we will spend a lot of time together, since many are injured.
"I immediately felt support from him. I knew how great a player he was for Arsenal. His help helped me a lot to become myself in the locker room. I often tell my family that Hector helps me, takes me on walks around London. I think even they appreciate his help.
"At the moment, he is the closest person in the team to me. Without him, I would not have been so good at Arsenal and London."