The Spanish international concedes that it hasn't been all plain sailing for Chelsea this season, but insists that a team can only be judged at the end of the campaign.
"We are close, closer than it looks," Mata told The Telegraph.
"We are four points behind Manchester City and with a game against them now is the time for us to be together, to try to win as many games as we can because we still have the possibility of two trophies and to finish in the top two.
"It's true we've had good and bad moments [this season] but it's at the end of a season when you have to think and realise it was a good or bad season. [Right now] we still have chances to win."
Chelsea play Man City at 1.30pm this afternoon.