Currently the Blues sit third ahead of Sunday's match at champions Manchester United and next week's crucial London derby with Tottenham, who sit three points behind in fifth.
Mata said: "Our aims have to be winning this trophy (Europa League) and obviously being in the Champions League next season.
"Chelsea is a club which deserves to be in the Champions League every season.
"We can do it. If we play like we've been playing, all together, I think we can do both."