The 49ers’ first loss of the season couldn’t have gone much worse. They had opportunities to win, and pushed the Seahawks to the final seconds of overtime, but they couldn’t secure a victory and fell to 8-1 on the season.

It’s hard to glean a lot of good from a contest as gut-wrenching as Monday night, but there are a few positives the 49ers can focus on as moving forward.

Dre Greenlaw was good

Losing linebacker Kwon Alexander could’ve been a crucial blow for San Francisco’s defense, especially since the rookie Greenlaw was his replacement. The fifth-round selection out of Arkansas acquitted himself well with eight tackles, a pass breakup and an interception that nearly won the game for the 49ers. He picked off Russell Wilson in the red zone in overtime, and nearly took it back for a touchdown. Greenlaw should be a perfectly suitable replacement for Alexander in the heart of 49ers’ defense.