I think the C's will come out with a good game tonight.
They played good against the Sixers and Raptors (well for about 46 minutes anyway), and struggled against lesser teams in New York and Orlando. I don't think the C's take weak opponents seriously enough, but they'll respect OKC. Plus they've had a couple of days to regroup and practice. They should come out strong and be able to maintain it all game.
And Smart often plays good @ OKC (went to OK State after all). The 2 highest scoring games of his career were both @ OKC. And for his career, by opponent, Smarts has his highest career scoring, rebounding, a 3P% numbers against OKC (a Curry-esque 43.3%
).
Unfortunately that's all driven by his 2 highest scoring games which happened back in '15 and '16, not so spectacular in '17 and '18.