Yes that was a good signing by Arsenal because the position of Riccardo Calafiori is a very important and sensitive area of the defense and since Arsenal have got good strikers, the area they are having major challenge is within the defense region but now that Riccardo Calafiori who plays as a center back have been signed to the team, we should expect Arsenal's defense line to be solid since William Saliba who is a major figure in the defense line will now play along with Riccardo Calafiori and I have come across some news in the media that shows how eager Riccardo Calafiori was to sign for Arsenal, he was so happy to join a very active competitor of the English Premier league so i believe he will give his all to see them make good improvements in the new season. Within this 5 years of his contract with Arsenal, he must have blended so well with the team.