Chelsea manager Mauricio Pochettino says his side "should be in fourth position" according to "all the data".
The Blues are 11th in the Premier League table, 17 points behind fourth-placed Aston Villa.
The FA Cup is their only chance of silverware - although they face holders Manchester City in the semi-finals.
"We know really well what we are doing. That's why I laugh. I don't take it personally when the fans say that [criticise]," said Pochettino.
Chelsea rank fourth for expected goal difference per game, on 0.36 - with 50.64 xG for and 40.88 xG against in 27 games. Their actual goal difference is +2 (47-45), which is 0.07 per game.
However on nearly every other metric Chelsea rank lower than fourth including on goals, shots, shots on target, possession, passes, touches, touches in the opposition box, expected goals for and against and big chances.