21-year-old Dominic Thiem, who rose 100 spots in the rankings in 2014 to his current perch at No. 39 in the world, has begun a compulsory six-month stint in the Austrian army.

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According to the report, Thiem will not miss any tour events due to serving.

Thiem reached his first career final in Kitzbuhel this year, as well as notching his first top five win against Stan Wawrinka in Madrid. He also reached the fourth round of the US Open, taking out two top 20 seeds in the first week.

The rising ATP star posted a picture of himself in uniform, showing that he still has his sense of humor: