Sicario2 - Tier 1 We should really be signing a full back/defender between now and Friday. We got 6 defenders for 4 positions, 2 of them are injury prone (and we could lose one for a prolonged period in Jan as you said) and 1 could be on his way out.
Yeah I've been worried about this a bit.
Saliba, White, Gabriel, Timber, Kiwior, Cedric, Holding, Tomiyasu, Tavares, Tierney, Zinchenko.
Take out the ones who are either gone on loan or to be sold or injured or badly unwanted, and you've got …
Saliba, White, Gabriel, Kiwior, Tomiyasu, Zinchenko.
Across left, central, right defence we've got something like:
LB Zinchenko / Kiwior / Tomiyasu
LCB Saliba / Gabriel / Kiwior / Tomiyasu
RCB Saliba / White / Tomiyasu
RB White / Tomiyasu / Partey
That's a motley crew. Take out Tomiyasu as per last season and you're reliant on Kiwior rotating due to Zinchenko's brittleness, and you're also running a high risk of Saliba or White getting injured or jaded as per last season.
Timber was a very astute signing and would be a convincing fix to this situation if he were available. If Tomiyasu stays fit we're certainly no worse though.