Frank Lampard admits Chelsea's players are in need of a mental boost ahead of Sunday's clash with Manchester City.
After a 17-game unbeaten run that saw them touted in some quarters as Premier League title favourites, Chelsea have lost three of their last five games, winning only one.
A 3-1 defeat to Arsenal was a particular low point, and Chelsea were held to a 1-1 draw by Aston Villa in their last outing on Monday.
Chelsea are tied on 26 points with City, and Lampard said of the match: 'It's significant because it's a game we want to win, against a very good opposition.