#3 Bernd Leno (Bayer Leverkusen)

Arsenal's current first-choice goalkeeper is veteran Petr Cech and his performances have dipped considerably compared to his heyday at Chelsea. Understudy David Ospina is a solid performer but not quite at the level of some of the league's elite goalkeepers.
The Gunners have the pressing need to invest in goal and Bernd Leno could satiate the need. Leno has been the first choice keeper at Bayer for seven years and he has consistently impressed.
Arsenal need stability in goal to improve a subpar defence and Leno would provide that admirably. Furthermore, the German contingent at the Emirates would help him settle in.
Leverkusen recently signed goalkeeper Lukas Hradecky from Frankfurt, which suggests that the club are perhaps preparing for Leno's departure. Right time for the Gunners to pounce.