The Spaniard seemed unfazed when asked about the club manager’s apparent hesitancy in placing him in Chelsea’s first eleven in a post-match interview.
Juan Mata appeared for just the seventh time this season for the side from Stamford Bridge, but made his appearance count with a stunning goal in the second half which propelled his team to the quarterfinals of the Capital One Cup.
"I just try to play and enjoy my football," he told UK newswires.
"The manager is the one who makes the decisions. I always try my best for this club and today I really enjoyed it.
"I'm very proud for the fans here and at home. It's a pleasure for me and for us to play here with a lot of supporters and I'm really happy.
"Looking at our opponents this week, Manchester City and Arsenal, they are two of the best teams in Europe right now and we beat them so we are ready to fight for titles.
"Arsenal are a team that try until the end and create a lot of chances with the likes of [Santi] Cazorla, [Aaron] Ramsey and [Olivier] Giroud, so it was an important goal."
Teammate Cesar Azpilicueta also scored his first goal for the London club when Carl Jerkinson committed an error in the first 45 minutes of the game, leaving it easy for the 24-year old Spaniard to ease the ball past the Arsenal keeper.
The Spaniard told press that he found himself in a strange position when he surged forward to pounce on the Arsenal defender’s mistake.
"I don't know if I am allowed that far forward!" he quipped.
"But I felt there was a chance to score so I arrived there. I really enjoyed scoring here in a derby against Arsenal, it's always a pleasure to score."
The win means that Chelsea join the final eight of a competition that gave Jose Mourinho his first ever trophy when he took over the reigns at Stamford Bridge in 2005.