Arsenal new signing defender

You're referring to Arsenal's latest defensive signing!

As of my knowledge cutoff, Arsenal has signed the following defenders:

1. Takehiro Tomiyasu (Right-back) - Signed from Bologna in August 2021 for a reported fee of £15 million.
2. Ben White (Centre-back) - Signed from Brighton & Hove Albion in June 2021 for a reported fee of £50 million.
3. Albert Sambi Lokonga (Centre-back) - Signed from Anderlecht in August 2021 for a reported fee of £15 million.

Please note that the transfer market is constantly evolving, and Arsenal may make additional signings or sales before the next transfer window opens.