They can comfortably win three of those matches especially Tottenham, Manchester United and Nottingham which will be a very easy one for them, reason being that they will not allow a small team like that to beat them home and away, having lost first leg to them. You may argue that Tottenham will be difficult for them to win but that is not correct because Tottenham is very inconsistent, sometimes strong and most times weak. Liverpool will comfortably put them in their place and continue their lead of the table.
Only Nottingham Forest can be an easy opponent for Chelsea, but this team actually made many big surprise in this season, and it won't be shock if they do something amazing against Chelsea.
Manchester United and Tottenham have their problems but they have good players, and if in a match their players can play together well, they can challenge Chelsea considerably. I consider both Tottenham and Manchester United have more potential to get points from Chelsea, than Nottingham Forest. I agree that Manchester United and Tottenham are very unstable and unpredictable in their performances but in a big match, they will play with more pride of a big club and their players can tighten their bond and create kind of challenge against Chelsea.
Chelsea will be putting themselves in danger by underestimating any team that they will meet in their next opponent especially Nottigham Forest football club as they are in one of their best one in recent years so Chelsea should approach each match with all level of seriousness as they can be shock by experiencing a defeat in the hands of Forest so they should be careful going into the next three matches because any loss for them will not be a good results for Chelsea as they are contently in second position in the premier league mounting up pressure in Liverpool to make sure that they over take Liverpool in the league table