The new arrival from Borussia Dortmund is set to see action against West Ham.
He said: “It’s (been) special, but busy!
“From the moment I stepped on the plane, to medical tests, signing the contracts, getting in the gym, doing all the scans, it’s been a lot, but I’ve really enjoyed it.
“After training, I just think about what I have to do. I’ve really enjoyed it (so far), and I’m really looking forward to it.
“I remember I played (at Villa Park) with (Arsenal) 23s. It was one of the first stadiums I played in as an academy player. I was like: ‘Wow, this is very big.’
“To work there 10 years later is really nice, and I’m really looking forward to seeing it with all the fans.
“I’ve seen a few games, and how the stadium was against Bayern and Man City, so I’m really looking forward to it.”