Colwill was a key player for Chelsea, particularly in their build-up play, and his injury has left a gap that needs to be filled. Maresca has stated that the club is looking internally for solutions, but it remains to be seen whether they will be able to find a suitable replacement.

Chelsea's existing options, including Trevoh Chalobah, Tosin Adarabioyo, and Benoit Badiashile, are all capable defenders, but they may not offer the same level of output as Colwill. Badiashile, in particular, is highly regarded at the club, but he is currently out injured and may not be ready to return until mid-September.

Hato and Acheampong are also options, but they may not be ready to take on the responsibility of playing in such an important position. Fofana, on the other hand, is a similar profile to Colwill, but his ongoing fitness issues are a major concern.

Given the options available, it seems that Chelsea may indeed need to sign a new centre-back to replace Colwill. One potential candidate is Taylor Harwood-Bellis, who was previously with Manchester City and has a high ceiling. Another option is Antonio Silva from Benfica, who has a similar passing style to Colwill. However, the dream signing would be Inter Milan's Alessandro Bastoni, who is arguably the best central defender in the world.

Ultimately, the decision to sign a new centre-back will depend on the club's assessment of their current options and their willingness to make a significant investment in the transfer market.