Ruben reaches last four after opponent retires

Ruben (ATP-190) has reached the semifinals of the challenger tournament of Champaign ($ 50,000) in the United States. His opponent Brian Baker (ATP-260) retired in the second set.

Ruben is having an excellent run in the US and started well against home player Baker. The Belgian won the first set 6-3 and was leading 1-0 in the second set when his opponent withdrew

In the battle for a ticket to the final Ruben will face top seed Jared Donaldson (ATP-109). Last week the 20-year-old American won their encounter in the quarterfinal in Knoxville in three sets.