Nitin Kumar Sinha played a robust all-court game to beat the former champion Vishnu Vardhan 6-4, 6-1 in the men’s pre-quarterfinals of the Fenesta National Tennis Championship at the DLTA Complex on Wednesday. READ| In the women’s section, top seed Zeel Desai had to step up her game to beat Shreya Tatavarthy 2-6, 6-3, 6-1, and will play the reigning …