PHYSICAL pain and mental strain have combined to prevent Spaniard Seve Ballesteros from playing in next month's World Cup of Golf at China's Mission Hills. Ballesteros, a member of the victorious European Ryder Cup team, formally announced his withdrawal from the Heineken-sponsored event in Shenzhen. 'I regret very much not being able to play in the World Cup,' said Ballesteros, who has decided to take a five-month break from the game. Ballesteros' Ryder Cup teammate Sam Torrance has already benefitted from the Spaniard's self-imposed break by landing a place in next week's World Matchplay Championship. The 42-year-old Scot, second in the European Order of Merit, was 'flabbergasted' last week when he heard he was not in the original 12-man field. Meanwhile, Yau Sui-ming and Tang Man-kee have been confirmed as the Hong Kong representatives in this month's 36-hole Eastern Zone qualifier in Thailand to decide which four countries qualify for the World Cup at Mission Hills.