The youngster impressed in Arsenal's 2-1 EFL Cup victory at home to League One outfit Blackpool.
A former Barcelona academy player, Pleguezuelo has been with 'The Gunners' since 2013 and was handed his first senior appearance by Unai Emery on Wednesday night.
At only 21, the youngster has a bright future ahead of him and is already targeting more first team football with the club.
"I couldn't be any happier, I'm buzzing. I tried to stay calm. I knew this was a very big chance for me. It doesn't happen every day that you play for Arsenal's first team" he told the 'Daily Mail' after the game.
"I just tried to do everything simple and play for the result. I'd love to play that (the north London derby). As I said, I have to keep working and see if I can get another shot."
He also revealed that he will be given more chances under the new Arsenal manager.
"I have had a few chats with him during the season," Pleguezuelo added.
"He told me to keep working as I had with the Under 23s and my chance would come. Fair play to him, he gave me that chance. I'm so happy and thank him very much for that.
"This year we have a very good Under 23 squad and it's good to see those players can still make it to the first-team and get some minutes. It should be an inspiration for everyone", he added.