I think the game is open to be won by either of Chelsea and Newcastle United. While Chelsea are knownn to be an inconsistent team and poor in front of goal; this season Newcastle United has also been inconsistent and injury ravaged which is enough reason to help gamblers understand its either any team wins or a draw ensues
Personally, i think Chelsea will win the tie, they are in good spirits and better form as well.
To speak on a more serious note, Chelsea should ordinarily win this match even with a 1 goal difference over the Newcastle because they have all it takes right now to make that possible but I will still say that it is the decision of the manager at first then that of the players too to win this game.
If Chelsea can play with Newcastle the way they played Manchester City, it will definitely become so much easier for them to score Newcastle. But if they just want to win, they must do the needful including the coach, Pochettino and the top strikers that are on the field. Teamwork is the best form of defeating an opponent in this dicey game of football.