Ruben (ATP-145) failed to win his first match at the Challenger tournament of Phoenix (United States, CH 125). He lost in two sets to a Russian.
Ruben was opposed to Evgeny Donskoy (ATP-122) in the first round. In previous encounters Ruben was leading 3-2. In Phoenix Donskoy was the better one, he won in two sets with 6-3 and 6-3. The match lasted 1 hour and 8 minutes.
Ruben (ATP D-314) will still play doubles together with Peter Polansky (ATP D-143), in the first round they meet third seeds Rohan Bopanna (ATP D-38) and Divij Sharan (ATP D-40).