London, July 21 -- Mikel Arteta said Arsenal are "short on numbers" and are looking to "improve the depth and quality" of the squad.
The Gunners have been busy in the transfer market and have completed deals for Martin Zubimendi, Kepa Arrizabalaga, Christian Norgaard and Noni Madueke for a total of about £123.5m.
They are also still in negotiations for the 73.5m euros (£63.5m) transfer of Sporting striker Viktor Gyokeres and working to bring in young defender Cristhian Mosquera from Valencia.
Arsenal had been hoping to finalise a deal for Sweden international Gyokeres and include him on their pre-season tour but a transfer has yet to be completed, although Arteta has not ruled out new signings joining them in Asia.
"I cannot c...