I answer your comments, including: how many Slams will the NextGen win in 2021, should Rafael Nadal play any more tournaments this season, which nation has the best prospects, is Andrey Rublev too one-dimensional, can Nadal beat Djokovic on hardcourt with newfound confidence, should their be a year-end #1 this year, what should Jannik Sinner improve, Rafa's health, does Slam distribution matter, do we have recency bias, is Dominic Thiem better on hard court than clay, is Australian Open 2021 must-win for Novak, is Djokovic showing concerning signs of age, how does Diego Schwartzman make up for his height, what should Djokovic have changed in the final, did the semifinal against Tsitsipas doom Djokovic for the final, a check in on Andy Murray.