The Spanish defender replaced Andre Santos in the second-half of the Champions League clash with Olympiakos on Tuesday.
“It was amazing, it was a great atmosphere,” Miquel said on Arsenal’s official website. “I never expected it to be like this and making my debut in the Champions League is great for me.
“Unfortunately we lost but it was my next step for me. I just need to get here more often now. You could see that they went out like they had to win.
“They won but unfortunately they didn’t go through. They had a great game, pressed up a lot and eventually got the goals. I think we had quite a lot of chances in the second half to draw the game but that’s football.
“They backed up once in the game and that was when we scored, but they couldn’t do it again in case they lost. They pressed up so we couldn’t play our football that much and got the result.”
