Yuki Bhambri downed Davis Cupper Vishnu Vardhan to claim the men's singles crown while young Rutuja Bhonsle prevailed over experienced campaigner Isha Lakhani to emerge winner in the women's singles event of the Fenesta National Tennis Championship in New Delhi on Saturday evening.Yuki, playing after a long time due to injury issues, scored a 6-4, 7-6 win over top seed Vardhan.Former champion Isha had to settle for a runner-up finish this time around as the 15-year old Rutuja claimed a 6-3, 6-3 win in the final.