D. Gururaj (Karnataka) got past second seed Dr. V. Rammohan Rao (A.P.) 6-2, 4-6, 6-4 and entered the quarterfinals of the plus-55 category at the GVK senior National-ranking tournament here.R.E. Sudarshan Rao (AP) bt M.S. Sridhar (AP) 6-0, 6-1; M. Suresh (AP) bt Bhushan Akut (Mah) 6-1, 6-2; Mayur Vasant (Mah) bt V. Shankar 6-0, 6-0; Yogesh Shah (Guj) bt K.S. Raju (AP) 6-1, 6-0.D.S. Ramarao (Mah) bt...