India have rounded off their warm-up campaign ahead of the hockey World Cup on a positive note. At the Hague, Netherlands, today, they defeated South Africa 4-1. India's three goals came from penalty corner conversions. Rupinderpal Singh accounted for two of them, while the third came through V R Raghunath. Captain Sardar Singh also contributed to the scoreline with a field goal.India had earlier lost 1-2 to Argentina in the first practice game. India will open their World Cup campaign against Belgium in a tough Group A on Saturday.