Chelsea boss Thomas Tuchel admits defensive signings are a priority.
Tuchel is expected to welcome the signing of Napoli defender Kalidou Koulibaly in the next 24 hours.
He said: "The priority right now is defence, it's not a secret. From there we need to see what's possible.
"We're competing against the two top teams but Tottenham did a very active and aggressive and early transfer period, they have maybe the strongest squad they ever had with one of the best coaches in the world.
"Man Utd are never shy of recruiting with a new coach and Arsenal had some big signings already so we need to keep the level up to be competitive."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!