Yes, Chelsea haven't obtained a maximum of points (3 points) in their past four games in Premier League, and If you fast-forward back into their historical games records, you would find out that most of these games during December isn't always in their favor, Chelsea usually struggle or had difficulty in winning their games and getting maximum of points this period, they drew their last Premier League game against Crystal place and, lost two games, to Ipswich Town and Fulham and drew one against Everton, thereby losing 10 points in total in all these games.
Previously Chelsea had shown a positive direction for the competition in the Premier League but lost their best form in the previous four matches. A win against Morecambe could provide a turning point for them to perform better even though Morecambe is not a tough and balanced opponent for them. Facing Bournemouth next week will not be easy because they look more consistent in the previous nine matches and are unbeaten. Chelsea must be able to win the match because if they fail again then their position in the top four will be shifted by Newcastle or Manchester City so there is no other way but to get a win in the match.