The Scotland international was once again exceptional for the Gunners in Tuesday's 1-1 draw with Leicester City, in what was his five straight start.
Speaking after the game, Tierney said: "It was very tough, against a team who are good at keeping the ball. But we did well and dig in. We conceded a goal but we did well. It is focus and determination.
"It gives us confidence to keep the run going and stay unbeaten. We wanted to win but so long as we don't get beat.
"I feel since the break I have come back better. I feel more settled in London. The break had done me wonders and I am grateful for every opportunity I get."