Arsenal sign Valencia defender Mosquera

The Spain under-21 international joins for an initial fee of around £13 million, with performance-related add-ons, and is understood to have agreed a five-year deal with an option of a further year. The 21-year-old, Arsenal's fifth signing in recent weeks, is set to provide cover for William Saliba and Gabriel at the heart of the Gunners' defence, but can operate anywhere along the back line. Mosquera, who played 41 times for Valencia last season, has joined Arsenal for their tour of Singapore and Hong Kong.