Graham Potter is set to enter arguably the most important week of his managerial career without one of his biggest players and characters available for selection.
Thiago Silva was forced off injured in the first half against Tottenham at the weekend, with Chelsea becoming noticeably weaker at the back after he was substituted.
His replacement on the day was Wesley Fofana, who supporters will no doubt be happy to see return to the pitch after his Blues career has been plagued by injuries.
However, finding a strong partnership will certainly be difficult without the Brazilian available, especially when taking into account the magnitude of the games coming in the next week.
The Premier League clash with Leeds United will be one the manager is desperate to see a return to form in, before they line-up for the biggest game of the season so far.
Potter should consider new formation
Chelsea are looking to overturn a 1-0 first leg defeat to Borussia Dortmund, with the Champions League really their only games that particularly matter in terms of fortunes next season.
Due to the importance, and lack of Silva, Potter should consider adopting a back three for the upcoming games.
It is a system many of the squad will be familiar with, after it being the preferred choice of system for previous manager Thomas Tuchel.
It will also allow the wing-backs, Reece James and Ben Chilwell, to pick up even more attacking areas and utilise their creative skills more again.
The issue will be finding a trio to feature against Dortmund, with Benoit Badiashile not available for European fixtures. This could see a sensational return for Marc Cucurella, to play alongside Fofana and Kalidou Koulibaly.
There is also the option for Trevoh Chalobah to return to the starting side, with him not featuring for some time now.