Rangers will face the winners of PSV Eindhoven or Sturm Graz in the Champions League play-off round - if they overcome Servette.
Michael Beale's Ibrox side begin their quest to qualify for the group stages this week with the first leg of their third qualifying round clash against the Swiss club.
Should Rangers triumph then they will advance to the play-off round which is the final qualification hurdle before making the group stages.
Rangers were seeded in the draw for the play-off round and have been drawn against the winners of the match between Eindhoven and Sturm Graz - again if they beat Servette.
Rangers will have the first leg at Ibrox should they qualify having been drawn first.
The play-off round first leg fixtures will be played on August 22/23. The return leg will take place the following week on 29/30 August.
Rangers' potential Champions League play-off fixtures
Rangers/Servette vs PSV Eindhoven/Sturm Graz - August 22/23
PSV Eindhoven/Sturm Graz vs Rangers/Servette - August 29/30
