Arsenal new signing David Luiz has been handed his jersey number, after completing a shock move from city rivals, Chelsea.

The Brazilian will wear the number 23 shirt, which was initially worn by Danny Welbeck, who left the club at the end of last season.

The club confirmed the signing of the 33-year-old on Thursday night, after passing his medicals earlier on.

Arsenal manager Unai Emery was delighted to sign the experienced centre-back, whom they worked together during their time in France with PSG.

“David has huge experience and I look forward to working with him again. He is a well-known player and adds to our defensive strength,” Emery said as quoted by the club’s website.

Luiz is said to have made the decision to ditch Chelsea after reportedly learning that he might fall down the pecking order at the club, with new manager Frank Lampard thought to be preferring Christensen and Zouma ahead of him.

His arrival will be a relief to many of the club’s fans, who saw their team struggle last season in defence, which eventually cost them a place in the Champions League after finishing fifth in the League.