10 most expensive signings Chelsea will regret making in the last 10 years. No. 5 may be the worst Posted By: THE REAL CHELSEA FANS April 4, 2024 Tiemoue Bakayoko Photo: Getty images Signed for £40m from Monaco in 2017, Bakayoko never worked at Chelsea. He went on several loan spells, but never really made it. 1 2 3 4 5 6 7 8 9 10 Share this:FacebookXMoreEmailRedditTelegramWhatsApp