He was not going to start the match thanks to the presence of David Ospina, but Arsenal will not have Wojciech Szczesny available for Saturday's contest against Liverpool.
.@13Szczesny13 misses today’s game with a rib injury #AFCvLFC pic.twitter.com/iAYlumeSH8
— Arsenal FC (@Arsenal) April 4, 2015
As a result, 20-year-old Matt Macey will serve as the backup to Ospina.