There were two occasions (once per half, once on the left and once on the right), where he got the ball under pressure facing backwards being heavily marked by someone, turned his man effortlessly, and charged away with speed and skill. The one in the 2nd half was the one where he left Kanté for dead.
That's the thing Sterling does best. That's the thing that very few players on the planet can do. That's the thing that meant that during the world cup in 2018 he was getting more heavily marked than Kane.
If he can start doing that more frequently then we're in for a lot of joy.