Arsenal are expected to act after Chelsea's move for Crystal Palace midfielder Michael Olise.
The France U21 international is currently recovering from a knee strain suffered at the U21 Euros.
Chelsea have met the 35m buyout clause in Olise's contract and hope to wrap up a deal quickly.
However, Football.London says Arsenal could yet act after learning of Chelsea's attempt.
Gunners chief Edu is a fan of Olise and his versatility is something attractive to manager Mikel Arteta. As such, they're not expected to allow Chelsea to have a free run at Olise.