The Bhoys have already started pre-season training due to the Champions League qualifiers, which start next month.
Last season, the Scottish Premiership champions failed to make it through to the group stage of Europe’s premier club competition.
Many will expect the Celtic players to be under pressure this time, but Armstrong has insisted that they are relishing the challenge.
SA on drawing @FCStjarnan "Excitement. At that stage, any competition is tough. We are looking forward to it and will prepare right." (MH)— Celtic Football Club (@celticfc) June 25, 2015
SA: "Quickest competitive game I have had coming back to pre-season. But there isn’t that element of pressure, more excitement." (MH)— Celtic Football Club (@celticfc) June 25, 2015
Champions League dream
Last season, after getting the better of KR Reykjavik and Legia Warsaw in the second and third qualifying rounds respectively, Celtic faced NK Maribor in the playoff round.
Although the Scottish giants drew the first leg of the tie 1-1 in Slovenia, they lost the second leg 1-0 at Celtic Park.
This time around Ronny Deila’s side will face Urvalsdeild champions Stjarnan in the second qualifying round of the Champions League.
The first leg of the tie will be played at Celtic Park, and the second leg will be held in Iceland.