Man Utd veteran Giggs: Decisive week looming
United lost 2-1 in the FA Cup at Anfield a fortnight ago but bounced back to beat Stoke 2-0 before that incredible fightback to draw 3-3 at Chelsea.
Liverpool's visit is followed by trips to Norwich and third-placed Tottenham.
Giggs said: "It's a tough run but these are the games you want to be playing in.
"We're not quite at the make-or-break part of the season but it's an important time and we know that if we win these games we'll be in good shape."