Chandigarh, Jan. 10 -- Riding high on good tennis, top seed J Malkowski of Switzerland outplayed India's Nishant Dabas (IND) 4-3(4), 4-0 while fifth seed Leo Raquin of France beat India's Arnav Pathange 4-3(1), 4-2 in the boys singles pre-quarterfinals during the ITF World Tennis Tour Juniors (Grade-3) for boys and girls under-18 at the Chandigarh Lawn Tennis Association (CLTA) Stadium, Sector 10, Chandigarh, on Thursday....