Arsenal have failed to kick on and find a new lease of life since Arsene Wenger left the club in 2018. In reality, other than Pierre-Emerick Aubameyang, across the pitch, the Gunners have still struggled to remain consistently decent, especially at the back.
The defence has been an issue they have struggled with immensely for the best part of a decade. Now, six months after signing David Luiz, the Brazilian has not changed much and the Gunners remain defensively unstable - only eight teams have conceded more than them in the league.
This January, the north London club have signed Pablo Mari on loan from Flamengo at centre-back, but the Spaniard is yet to play in the Premier League, which is always a concern. The Gunners did, however, acquire the services of Cedric Soares, but again, this is on loan.
Mikel Arteta had been linked with big name defenders this window, such as Jerome Boateng, Boubakary Soumare and John Stones. Although, the Arsenal boss has failed to bring in a star name at the back - something they have needed for years. This could be another big issue for the Spaniard to contend with.