The 31-year-old made his first start of the season in Saturday's 1-0 home win over Leicester City.
"Of course [it has been frustrating]," Matic said. "I want to play, I always give my best for the team.
"The coach is the man who picks the team and when you are on the bench you are not happy, but I am trying to convince him to change his mind and pick me to play.
"The season is long. [Against Leicester] as you saw I played, and we won the game.
"I am happy so we will see in the future what the coach will decide
"I am ready. In the last 10 years I have played in a high level and every game I try to do my best to help the team because I think I am a team player and I can help a lot I think."