Carl Bialik joins me for a recap of the Miami Open, with a particular focus on the Italian teenager who reached the final there. Sinner has a relatively weak first serve, but seems to do everything else right. We talk about how to balance what he is with what he could be, the importance of his evident emotional maturity, whether he'll eventually win more first serve points, how well he'll fare on clay this year, and just how much we can compare him with Rafael Nadal. We also touch on the man who beat Sinner in the Miami final, Hubert Hurkacz. Is a 24-year-old without any obvious elite-level weapons still on the rise, or will the Masters 1000 title mark his career peak?