The San Francisco 49ers are 2-0, getting close wins over the Seattle Seahawks and New Orleans Saints to start hot on the road. Now, they take on the Arizona Cardinals in the season opener, looking to continue that trend at home.

Through the first two weeks of the year, the 49ers haven’t necessarily played the cleanest football on either side of the ball, but they’ve still managed to come together in the clutch, especially on the defensive side of the ball.

Where can they grow there, though, heading into Week 3?

“As the year goes on and more tape is being put on, there’s things that offenses will look for with regards to us creating and vacating different parts of our zones,” defensive coordinator Robert Saleh acknowledged. “Offenses are always chasing space. So, we’ve just got to be ver

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