CUDDALORE, India (Reuters) - Roger Federer swapped his tennis racket for a cricket bat on Saturday to the delight of scores of child survivors of the Asian tsunami in India.

The Swiss world number one, a UNICEF goodwill ambassador, hit a tennis ball with the wooden bat bowled by enthusiastic boys at a permanent shelter camp in Cuddalore district in the southern state of Tamil Nadu.

Around eight thousand people were killed in Tamil Nadu when the tsunami slammed into its crowded coast on December 26 2004. Tens of thousands including many children were made homeless.

In the Pudupettai rehabilitation colony, 180 km south of Chennai, the state capital, hundreds watched the improvised cricket game played on an old red coir mat that was placed on a makeshift pitch.

"It was good fun playing cricket here," Federer on a two-day UNICEF trip to the region, told Reuters after knocking a few balls that drew huge applause from tsunami survivors.

"I know the sport is huge here. I follow it myself," said Federer, whose mother is South African.