Even on a day in which the 49ers had a bounce-back victory, they also suffered a disheartening loss.

The 49ers generally played well in a 34-24 win over the New York Giants , but their defense was hit with a potential huge blow.

The 49ers fear that rookie defensive lineman Mykel Williams sustained a season-ending ACL tear , coach Kyle Shanahan said afterward.

Williams' injury came late in the game, and it marred what should have been an all-around good day for the team. The 49ers played so poorly in Week 8 against the Houston Texans, but they came through with a solid showing against the Giants to get back on the winning track.

Here is the report card from the 49ers’ Week 9 game against the Giants:

Rushing offense

After rushing for just 48 yards a week earlier against the Texans,

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