It seems like Chelsea's search of a goalkeeper will never end.

Because this time there are rumours like they are interested in the Brentford goalkeeper David Raya. He has played in 23 games in total so far and conceded 30 goals. 8 of these games were clean sheets for him. This is pretty good to me considering the team he plays for. However Chelsea still have contracts with Mendy and Kepa both for two more years now. I wonder what Potter is thinking about this situation. We don't even know if this is his idea. I don't think Chelsea's main problem is a goalkeeper now. They should focus on weak spots in the team first by creating some strategies for them.
Potter does not have faith in Mendy anymore because currently Chelsea have three keepers in the team with a new keeper coming in in the January transfer window. Signing of David Raya will only mean either of the two first choice goalkeepers will have to leave in the summer of any of the three to be loaned out but I don't think Chelsea will be signings a new goalkeeper except they have plans to sell one of theirs.
From the arrival if Graham Potter till date he doesn't have his hope on Mendy. Before Potter arrived, Tuchel was already using Mendy ahead of Kepa but when Potter came, he changed the arrangement and started using Kepa as first choice. Mendy should find his way, a second team player is hopeful of seeing match than second team goalkeeper