Chelsea defender Cesar Azpilicueta feels winning the FA Cup would not be enough to save the Premier League champions' season.
Antonio Conte's men dropped more points in Sunday's 1-1 draw against West Ham at Stamford Bridge to leave their chances of Champions League qualification seeming increasingly remote.
Chelsea are 10 points behind fourth-placed Tottenham with six matches remaining this season and have won only three of 11 in the top flight since the turn of the year.
Trips to Southampton and Burnley are up next for the Blues before they face the struggling Saints in an FA Cup semi-final at Wembley on April 22.
But Spain international Azpilicueta believes the drop in performance level from the Blues has been unacceptable.
"The FA Cup is a massive trophy, with a lot of history, but it’s not enough for us," he told reporters.
"We will try to win it, but the cup will not save our season.
"To get a draw at home in another London derby is really frustrating for all of us - and all of the fans. We are not happy."
While Azpilicueta would not be happy despite a cup win, team-mate Eden Hazard does not share his view, believing it is key for Chelsea to end the season with something to show for their efforts.
"I hope, for the Chelsea fans and ourselves, that we can achieve something," Hazard told reporters.
"We still have the FA Cup to play for, so we need to bring this trophy to Stamford Bridge at the end of the season."
