The England international signed a two-year contract extension at the club on Wednesday, and his manager is looking forward to seeing how he develops.
“He's a young centre back and you know that he's going towards his best period now," Wenger said. “He played a complete season at Middlesbrough -on loan last year].
“Unfortunately at the moment he's injured, but I believe it's important we keep our young centre backs because they blossom at 24. It's important to keep them during that period."