Carl Jenkinson believes Arsenal's defence holds the key to their chances of winning some overdue silverware this season.
Since conceding six goals against Manchester City on December 14, the Gunners have let in only two in eight games while registering six clean sheets.
Jenkinson was handed a start at the back as Arsenal crushed Coventry 4-0 on Friday to cruise into the last 16 of the FA Cup, and they now face a tricky Premier League clash at Southampton on Tuesday evening.
Laurent Koscielny and Per Mertesacker have formed a solid partnership at the heart of Arsene Wenger's defence, and Jenkinson insists the current back-line is their best for many years.
"I have seen a lot of talk about how brilliant the two centre-halves have been and the full-backs have done well also, while both (goalkeepers) Wojciech (Szczesny) and Lukasz (Fabianski) have been superb," he said.
"The defence has been very good this season and it is important going forwards that we have a strong defence because if you look at successful Arsenal sides of the past, they have all been built on a strong back four and a good goalkeeper.
"It is important we have that as a building block, and we have the right ingredients to go and win the league."
Jenkinson's first-team action has been limited this season as he and fellow left-back Nacho Monreal play a supporting role to Bacary Sagna.
But he added: "We have got four really good full-backs and so that means the boss can rotate when he feels it is appropriate.
"Bac has been playing so well this season it has been hard for me to get games, but as long as the boys are doing well, as tough as it is sitting on the bench, you just have to hold your hands up because we are top of the league and that is the main thing."
The FA Cup was the last trophy Arsenal won back in 2005, and Jenkinson insists they are taking the competition very seriously this year.
"The FA Cup is a massive competition, which everyone wants to be involved in," he said.
"You could see that when we played Spurs (in the third round) and also how seriously the boss takes it with the teams he has fielded.
"We all love being a part of the competition and will just look forward to the next round."