Terrible job.
1. He's too square while playing against a Red Zone route. He's supposed to play back to the Sideline at a 45⁰ angle & completely cut off the pylon
2. Knowing he has the End Zone literally 5-8yds to his back he should've been closer to the line & pressed immediately instead of giving a free release.
3. He's supposed to jam & steer the WR to the sideline, as soon as Nick gets off the line he should've engaged.
4. He let Nick get too far into his chest & therefore wasn't able to get in phase quick enough to locate the ball.
It was a terrific catch by Nick, but it was absolutely terrible coverage by the Corner.