The 24-year-old completed an €15 million move to the Emirates earlier this week, with Joel Campbell heading the other way on loan, and became the Gunners’ second signing of the January transfer window in the process, following the arrival of Krystian Bielik from Legia Warsaw.
Arsenal remain on course to defend the FA Cup after Sunday's fourth round win at Brighton and face Monaco in the last 16 of the Champions League, and the Brazilian centre-half is determined to ensure the club do not finish the season empty-handed.
“I know that we have great players of a high standard, players who are real stars, because if they were not stars they wouldn’t be here,” he told the club’s official website.
“Arsenal is a very big team and it must always be competing for the biggest titles in the world. I have to repeat it - Arsenal must fight for all the most important titles around.”
Arsenal are currently fifth in the Premier League – 13 points behind league leaders Chelsea – and face a fifth round FA Cup tie against Middlesbrough.
