Ruben (ATP-223) was not able to reach the main draw of Roland Garros (France, Grand Slam). He lost in the decisive qualifying round in three sets.
Ruben faced German Daniel Altmaier (ATP-184) in the third qualifying round. Ruben lost the first set with 3-6, but played impressive in the second set, which he won with 6-1. But in the third set Altmaier was again too strong with 3-6.
In 2015 and 2018, Ruben reached the main draw in Paris.