Ramkumar Ramanathan squandered a one-set advantage to lose to lower-ranked American wild card, Alexander Ritschard, for a first- round exit from the Binghamton Challenger event here.
The second seeded Indian, who got a first-round bye, lost 6-2 6-7(3) 2-6 to the 443rd ranked American in the second round of the USD 54160 hard court tournament.
Enjoying a career-best singles rank of 167 and coming into the event in good form, it was a surprise defeat for the Indian.
He had ended runner-up at the Surbiton Trophy Challenger and won the Guzzini Challenger in Italy recently.
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