Rennes stuttered to a goalless draw in their final Ligue 1 match preparation before Europa League Group E action gets underway against Celtic this week.
The French outfit couldn't find a way past Brest in their league campaign as they drew 0-0 at the Stade Francis-Le Blé.
Julien Stephan's side were left ruing a VAR decision when the referee ruled out a goal by £19million man Raphinha twice.
Stade Rennais v Celtic | TV times, kick-off, odds and team news
And they were forced to settle for just a point as they get ready to welcome Neil Lennon's troops to Brittany this week.
Meanwhile Rangers' opening fixture opponents, Feyenoord, managed a 3-2 victory in the Netherlands - despite conceding TWO comical own goals.
Rangers v Feyenoord | TV times, kick-off, odds and team news
The hosts led 3-0 after just 30 minutes before a seemingly hopeful delivery from the ADO Den Haag left-flank was knocked into his own net by Edgar Ie.
A second cross from another hopeful free-kick - with eight minutes to go - was then headed into his own net by Renato Tapia.
Two penalty kicks were needed for Feyenoord to win the game.
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