Burnwinter I'm not worried about White. He's shown more than enough to prove he can be relied on. Assuming Tomi is back by mid-Jan, he should be fine to cover off the required minutes.
The bigger issue for me is that we now only have Kiwior as cover for Zinchenko, which is less than ideal given the former is still yet to prove he can be a properly two-way defender and the latter is still yet to prove his fitness can be relied on.
Edit: actually just realised that if one of our CBs get injured, we worryingly close to Cedric getting game time.