Celtic suffered a rare league setback earlier this week when they were condemned to defeat by a stunning goal in the 1-0 loss to St Johnstone.
Armstrong has stressed the need for the side to react in positive fashion, highlighting a couple of areas the team need to improve on this weekend.
“Credit to St Johnstone because they played well, defended well and they were hard to break down. A lot of our possession was in front of them and we couldn’t seem to find that killer pass,” explained Armstrong.
It’s difficult for any team to play in behind a defence when the opposition drops off and narrows up.
Celtic have several players who can get possession and be creative from midfield so it’s no surprise sides drop off and make it difficult for them to take advantage.
Manager Ronny Deila will be aware of the need for greater penetration in the Scottish Cup game this weekend and he may have stressed a couple of things in training.
Celtic could move the ball into wide areas faster, which will stretch the opposition defence and create space in the middle of the pitch.
He may also be encouraging his players to take more risks when they get forward, as they look to thread a ball into a small pocket of space for an attacking player to get on the end of.
There’s not a lot wrong with this current Celtic side, they can adjust and need to show the courage to bounce back this weekend.