Mumbai, Feb. 6 -- Around this time a couple of years ago when she captured her first ITF title, Sahaja Yamalapalli was ranked in the 1000s. On Monday playing her first match at WTA level as India women's No. 2 at 336, Sahaja produced the biggest victory of her career by beating top seed and world No. 92 American Kayla Day 6-4, 1-6, 6-4 in the first round of the WTA $125,000 L&T Mumbai Open....