They were lucky to win because I don't know what's wrong with Chelsea, they always seem to start games well. However, by the end of the match, they seem to be playing with the ball anyway and start creating goals that aren't necessary. Take a look at the unnecessary foul that Gallagher committed in the final seconds of the first half, which resulted in a red card. they were just lucky to win, their midfield and defence are always at their best, but they still need to focus on that striker.
Honestly I don't know why the Chelsea team keeps getting unnecessary red cards this season. This thing is really getting too much and I think the manager really has to take this thing very serious and talk to the players about playing safe. When a player picks up a red card it expose the team to a danger of losing the match and makes the rest of the players labour more hard. Chelsea were really lucky to have won the game yesterday honestly speaking. Congratulations to them.