Two cup ties where rotation changes the faces but not the basic shape.
Manchester City keep the ball and still have Foden, Doku and Kovacic in a second XI, while Brighton are missing Mitoma, Ferguson and Yohanna up front and scored nothing in their last two away games. City should hold territory and create more chances than a thin Brighton front line. That is why I'm siding with City to win in normal time.
Liverpool against Chelsea is an open pairing: both score about two a game and concede 1.2 to 1.8. Chelsea are without their first-choice goalkeeper, Liverpool without Frimpong, and most of Chelsea's recent games have been high scoring. I expect a first goal to stretch the game as the benches change. That is why I'm leaning toward goals at Anfield.