The Uruguayan was signed from Sampdoria over the summer and after having to bide his time in the opening weeks, the Gunners' improvement coincided with the playmaker's ascension into the team.
Torreira has played his part in Arsenal's recent run of 13 games unbeaten in all competitions and has injected the tenacity the club's midfield has been lacking in recent years.
The 22-year-old believes working hard in training has helped him settle in at the club and contribute to what he says has been a "great" start to the campaign.
"I prepare myself a lot during the week to be able to stand up to this kind of game," Torreira told RedeTV.
"This league requires a lot of intensity, a lot of play. Well, I've been doing my best, with the help of my teammates, with all the technical staff as well, which gave me a lot of confidence.
"And today I feel, sincerely, very happy in the team. And happy because we're doing great things."