Sources close to the player claim that he wants to join Manchester United this summer.
The final year of Kalajdzic's contract is thought to be of interest to United, as they look to bolster their forward line before the window closes.
Kalajdzic's development would not be harmed if he stayed at Stuttgart according to Austria's head coach and former United interim manager.
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The player feels the time is right for a new challenge. In 58 games, he has scored 24 goals.
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Ten Hag has not been able to strengthen in the attacking department despite the fact that United has brought in defenders Lisandro Martinez and Tyrell Malacia.
With Anthony Martial currently injured, United are searching for more options up front.
They missed out on Benjamin Sesko and withdrew their interest in Marko Arnautovic.
United have spent a lot of the window trying to get Antony, but it has been known for a long time that Ajax plan to keep him and would expect just shy of 700m for that to happen.
They are considering a move for Gakpo, who is with the same agency.
You can watch the game on Sky Sports from 5pm on Saturday.
The transfer window will close at 11pm on September 1st.
Sky Sports has a dedicated Transfer Centre website where you can keep up-to-date with all the latest news. Sky Sports News gives you the ins, outs and analysis of sports.
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