Although the returns of Ben Chilwell, Mateo Kovacic, Wesley Fofana and Denis Zakaria are all timely for Chelsea ahead of the trip to Borussia Dortmund, it's another player that will be the most important for Graham Potter.
Raheem Sterling is still out after suffering a setback, Christian Pulisic remains sidelined and N'Golo Kante, though nearing fitness, is still some weeks away from action. Nevertheless, the squad Potter has for the Champions League tie is almost certainly his strongest for several months.
He has been firefighting at Stamford Bridge, papering over cracks left by consistent injuries to star players across the squad. Although it will take time for the old squad to mix with those that have been added in January as well as integrate with those emerging from the treatment room it is still a big boost.
