San Francisco 49ers: Three keys to Sunday’s matchup with the Detroit Lions

INDIANAPOLIS, IN - AUGUST 25: Jimmy Garoppolo #10 of the San Francisco 49ers throws a pass against the Indianapolis Colts in the second quarter of a preseason game at Lucas Oil Stadium on August 25, 2018 in Indianapolis, Indiana. (Photo by Joe Robbins/Getty Images)
INDIANAPOLIS, IN - AUGUST 25: Jimmy Garoppolo #10 of the San Francisco 49ers throws a pass against the Indianapolis Colts in the second quarter of a preseason game at Lucas Oil Stadium on August 25, 2018 in Indianapolis, Indiana. (Photo by Joe Robbins/Getty Images) /
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San Francisco 49ers
MINNEAPOLIS, MN – SEPTEMBER 09: Jimmy Garoppolo #10 of the San Francisco 49ers passes the ball in the first half of the game against the Minnesota Vikings at U.S. Bank Stadium on September 9, 2018 in Minneapolis, Minnesota. (Photo by Adam Bettcher/Getty Images) /

2. Red Zone Efficiency

The 49ers’ red zone offense underperformed during the preseason, and the results weren’t any better against the Vikings.

Last week, three red zone trips resulted in just six points – an Alfred Morris fumble and two field goals. (The other field goal and touchdown were scored from outside the red zone.) The Morris fumble was especially disappointing, as it killed an otherwise impressive 14-play drive.

One of the red zone field goals came after Garoppolo’s errant high throw to an open George Kittle in the back of the end zone. These costly mistakes are the difference between a win and a loss.

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Coach Kyle Shanahan employs more of a speedy, stretch-the-field type offense, so the Niners aren’t especially suited to grinding out a few yards on the ground as they near the goal line.

Especially against an elite defense like the Minnesota Vikings, running between the tackles is difficult at best. The Detroit Lions should pose less of an obstacle on Sunday.

Perhaps fullback Kyle Juszczyk will see some touches, either as a running back or receiver.

Juszczyk was targeted twice and had one reception for 56 yards against Minnesota.

Regardless of how they do it, the 49ers must demonstrate the ability to finish off drives as they approach the end zone.

Field goals will doom them to watching the playoffs on TV.