Arsenal may have inadvertently announced their fifth summer signing after an image of Cristhian Mosquera was accidentally posted online.

Arsenal's signing of Valencia defender Cristhian Mosquera has been delayed due to 'complications' during his medical, according to club insiders. The Gunners managed to agree a deal to sign the Spain youth international earlier this week, having returned to the negotiating table with an improved bid after seeing their opening offer rejected.

Arsenal are working to complete a deal to sign Valencia centre-back Cristhian Mosquera. Personal terms are in place with the 21-year-old and the two clubs are close to reaching an agreement. The Athletic previously reported that the north London side were working on a deal to sign Mosquera with a defensive signing a priority this summer.