Yup, me too. I'm still kicking myself (sorta) for not sticking with my gut, in the rankings competition. I balked last second and changed #1 to Alcaraz.
Ultimate Tennis Statistics hasn't updated their Elo rating all year, but Sinner's definitely surged past the 2300 level, so into the top 30 all-time. Tennis Abstract his him #1 in Elo at 2240 (their number is about 100 points lower than UTS), which is higher than Alcaraz's best.
I'm also remembering how I shared a chart comparing Jannik's and Roger's Elo rating through their careers, and how closely Jannik mirrored Roger's rise. Here are a few charts, taken from UTS (so only through 2023):
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So now Jannik is a bit over halfway to 23 and probably around 2350 now, so he's really closely following Roger's path. Will be interesting to see high he goes.