The 49ers defense looked solid to start Sunday’s game while the offense was held to a three-and-out on their first drive. However, the 49ers were able to end the first quarter with the ball in Atlanta territory.

The first quarter didn’t offer much as the 49ers and Falcons finished tied at zero. Here are the three things that stood out:

Strong first series from Marcell Harris

Harris struggled last week in New Orleans, but looked good on the Falcons’ first drive Sunday. On the second play of the drive, Matt Ryan hit Kenjon Barner on a screen and Harris made a nice tackle to hold the gain to four. The Falcons then had a third-and-4 at their own-41 when Ryan threw a pass intended for tight end Austin Hooper that Harris broke up. With the lack of depth on the defense, Harris’ first drive is encouraging for the 49ers.

Constant pressure on Ryan

The skill gap between the 49ers’ defensive line and the Falcons offensive line was on display in the first quarter. While the 49ers weren’t able to get to Ryan for a sack, they’ve been able to keep him uncomfortable in the pocket and force him to make quick throws. At some point the 49ers should be able to get to Ryan, but what they’ve shown in the first quarter is a good sign.

Playing aggressive early

After a three-and-out on their first drive, the 49ers defense was able to get the ball into Atlanta territory on their second. They faced a fourth-and-1 at the Atlanta 36-yard-line. Instead of attempting a 54-yard field goal, Kyle Shanahan elected to go for it,  drawing up a pass play for George Kittle who was able to gain five and a first down. The early aggressive call could be sign of things to come and how Shanahan calls the game.