Ruben (ATP-110) was not able to reach the main draw at the ATP tournament in Stuttgart (Germany, € 729 340). He lost a close match to an American.
Third seed Ruben had to face American Christian Harrison (ATP-207) in the first qualifying round. In the first set, the American won a close fight with 5-7. In the second set, a tiebreak had to bring the decision, which also went to Harrison 6-7 (4). The match lasted 1 hour and 37 minutes.