"I really enjoyed my loan spells at Lorient, Betis, Olympiacos and more recently at Villarreal," the 23-year-old told Arsenal Player. "Those experiences really helped me in terms of my personality and as life experience. They were great times for me.
"I had a great coach in Christian Gourcuff [at Lorient] and learnt a lot of things from him. It was like my first lesson here in Europe, I was happy and enjoyed it to the full. It's an important part of who I am today.
"Betis also treated me really well, the fans were amazing and I have to say I really enjoyed my stay there. The team had a great season and the fans were right behind the team and me personally so I'll never forget my time there.
"At Olympiacos I had lots of confidence - the coach, Michel, gave me a lot of confidence and made me an important player in the team, which I was able to make the most of. I was a more mature player by that point too as I'd been in Europe for two years and that was really important for me."