Good! Maybe he'll drive harder in the coming races! (I'm not saying he didn't drive hard. But, he has under-performed at times and seemed a little lacking in the motivation department.)
From what I saw, though, watching JJ's in-car (actually, rear bumper cam) the last few laps, the only way Jr got as close as he did was because JJ slowed down some because of traffic. Otherwise, there would've been a larger gap than there was.