The Red Devils have gathered four points from their first two games.
"I'm very happy to be here and very happy we have started the season," Mata told ESPN.
"The [summer preseason] tour [to Australia, China, Singapore and Wales] was a nice few weeks for all of us to be together. We are only starting, but we're happy.
"I would be happier if we had six points. That's what we felt after the Wolves game but the first game was very good against a good side [Chelsea].
"We've got four points, but we're looking forward to getting three more on Saturday [against Crystal Palace].
"Every time that you start a new season there is excitement. We have a manager that everyone knows, he's been around the club for many years and has done great things here.
"We are all very excited about what we can do. Hopefully we can have a great season and keep our fans happy and excited until the end of the season."