Arsenal have completed the signing of defender Cristhian Mosquera from Valencia for an initial fee in the region of 15m euros (£13m).
The 21-year-old has joined the Gunners on a five-year contract, which has an option for a further 12 months.
Mosquera can play at both centre-back and right-back and will fill the gap in the squad left by the departure of Takehiro Tomiyasu, who mutually agreed to terminate his contract earlier this month.
The Spain Under-21 international joined Valencia in 2016 as a 12-year-old before making his first-team debut in 2022 when he became the youngest centre-back to play for the club.