This week saw Mikel Merino become a Gunner as he put pen to paper on his Arsenal contract, and you can watch the best bits of his first day at the club in our behind-the-scenes video.
The Spanish international completed his move from Real Sociedad after undergoing the process of a transfer, including the medical, meetings, paperwork and media work that surrounds a deal.
However there is so much more, and you can see sporting director Edu travel to meet him off the plane and hand him his new number 23 shirt, as well as Mikel reading through a welcome letter from Martin Odegaard, and his reactions to seeing a film about the club.
Get a flavour of what Mikel went through to secure his move to Emirates Stadium by pressing play on the video above.
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