Somdev Devvarman has bowed out of the ATP Japan Open Tennis Championships. In Tokyo yesterday, the unseeded Indian lost in straight sets 4-6, 3-6 to World Number 24 Radek Stepanek of the Czech Republic in the first round of the hard court tournament. The Indian challenge is still alive in the ATP 500 event with Rohan Bopanna and his Pakistani partner Aisam-ul-haq Qureshi competing in the doubles. The Indo-Pak pair has been given top billing and they open their campaign against the Brazilian pair of Marcelo Melo and Bruno Soares.