Borussia Dortmund will begin their pre-season preparations when they take on Regionalliga Sudwest outfit FC Giessen on Tuesday.Neither side have been in action since wrapping up their respective league campaigns last term.The game will serve as one of five friendly fixtures lined up for Borussia Dortmund before they kickstart the new campaign against Wehen in the DFB Pokal.FC Glessen will trade tackles with another Bundesliga side, Eintracht Frankfurt, next week before returning to competitive action.Also See: Fabrizio Romano's Transfer Roundup: Manchester United pushing for 2 more transfers, Barcelona's plans for Lionel Messi and moreFC Giessen vs Borussia Dortmund Head-to-HeadThis will be the first friendly fixture between the two sides. Borussia Dortmund ended the last campaign with a strong run that saw them win their final eight games of the season consecutively.This run of form helped them secure a top-four finish, as well as the DFB Pokal title.Glessen also finished the season strongly, with four wins and a draw in their final five league matches.FC Glessen form guide: - N/A (first game of the season)Borussia Dortmund form guide: - N/A (first game of the season)FC Giessen vs Borussia Dortmund Team NewsFC GlessenThere are no known injuries or suspension worries for FC Glessen.Injuries: NoneSuspension: NoneBorussia DortmundDortmund's new manager Marco Rose has had a handful of senior players available to him in his opening training sessions. This could see him blend in with some under-23 players to augment his squad. View this post on Instagram A post shared by Borussia Dortmund (@bvb09)First-team players currently available include team club captain Marco Reus, Julian Brandt and Nico Schulz. USMNT forward Gio Reyna joined up with the squad on Saturday, while Erling Haaland is expected to join up later in the week.Injuries: NoneSuspension: NoneFC Giessen vs Borussia Dortmund Predicted XI FC Giessen Predicted XI (4-4-2): Frederic Lohe (GK); Ryunosuke Takehara, Tobias Reithmeir, Kristian Gaudermann, Niclas Mohr; Nikola Trkulja, Louis Munn, Nejmeddin Daghfous, Ali Ibrahimaj; Giuseppe Burgio, Takero ItoiBorussia Dortmund would not be Borussia Dortmund without the beautiful country of Brazil 💛Enjoy the very best of our BVBrazilian Legends! 🇧🇷 pic.twitter.com/9Nmt7BlmiM— Borussia Dortmund (@BlackYellow) July 11, 2021Borussia Dortmund Predicted XI (4-3-3): Marwin Hitz (GK); Nico Schulz, Senou Coulibaly, Nnamdi Collins, Felix Passlack; Goktan Gürpuz, Mahmoud Dahoud, Julian Brandt; Marco Reus, Steffen Tigges, Ansgar KnauffFC Giessen vs Borussia Dortmund PredictionThere are three tiers of club football between the two German sides and the gulf in class means that there should be only one winner here.Even though Marco Rose is likely going to give run-ins to several young players in his squad, Borussia Dortmund should still easily win a game against a fourth-tier club.Prediction: FC Giessen 0-5 Borussia DortmundAlso See: Austin vs Tigres UANL prediction, preview, team news and more | Club friendlies 2021