Ruben (ATP-215) was not able to reach the second round of the Challenger tournament in Prague (Czech Republic, CH 125). He lost in the first round to a qualifier.
Ruben played in the first round against the Czech qualifier Jan Satral (ATP-378). After more than an hour and a half, he had to surrender with 5-7 and 5-7.
Ruben (ATP D-166) is still active in the doubles together with the German Daniel Masur (ATP D-160). In the first round they will meet the French pair Pierre-Hugues Herbert (ATP D-19) and Arthur Rinderknech (ATP D-248).