He's only got a few hundred points to defend until Roland Garros, so a few good early results might get him a top 8 ranking which could stick with the better draws it would bring. As a top 10 player though you wouldn't think he'd go back in for 2025's generational 250 statpadding spree (3 titles won while only beating four top 100 players, the highest ranked of whom was number 74). You've also got to factor in that at some point in the year he's going to remember he doesn't really like playing tennis. All this considered I'll say he filters back in somewhere between 15 and 20 by the end of the 2026.