Mosquera turned down several other clubs to join Arsenal. Manager Mikel Arteta expressed his excitement about the new signing, highlighting Mosquera's potential and experience in La Liga. Arteta sees Mosquera as an intelligent player with good pace, who can play in various positions.

Arsenal's Sporting Director Andrea Berta also welcomed Mosquera, describing him as a "hugely talented young player" who will strengthen the team's squad. Berta noted that Mosquera is a versatile defender with a promising future in European football.