South Zone declared their second innings at 33 for four and set Sri Lanka A a target of 273 to win the tie.
Sri Lanka A went about their job with clinical precision. But they kept losing wickets at regular intervals, till Warnapura and J Silva came together for a 137-run seventh wicket partnership to seal the fate of the match.
While warnapura remained unbeaten on 111 with 13 boundaries, J Silva was bowled on 65 by Yo Mahesh. Silvas innings had nine boundaries.
O Maheshw was the pick of the South bowlers taking six for 71, while Ojha took one wicket. Sreeshant and P Reddy did not impress with their efforts.
South Zone 266&333 for 4 decl ( Robin Uthappa 144, Dinesh Karthik 95, VVS Laxman 45, Venugopal Rao not out 19; Ganegama 4 for 82) lost to Sri Lanka 'A' 327 all out and 273 for 7( BSM Waranapura 111, J K Silva 65, ML Udawatte 40; Yo Mahesh 6 for 71)