Gabriel Martinelli has welcomed Marquinhos to Arsenal.

The Gunners confirmed the signing of the 19-year-old wonderkid from Sao Paulo on Monday.

Marquinhos penned a long-term deal with the club and is expected to take part in upcoming pre-season fixtures.

Following the announcement, Arsenal ace Martinelli posted on Instagram: "Welcome brother, we are together."

Arsenal have paid £3m in compensation to Sao Paulo, despite the player being off contract.