Andy Roddick is competing in several exhibition events for charity this month.

Roddick announced at the ATP World Finals that he would be taking a week's break and then getting straight down to the business of getting physically fit and healthy for the new season after a demanding year with injuries.

He was competing today in a New Jersey charity event organised by friend Justin Gimelstob. The Bryan brothers, Lindsay Davenport and Mary Joe Fernandez were among the other stars in action.

Tomorrow he heads to Nebraska for another charity exhibition.

Roddick takes the opportunity in the off season to raise money for his foundation and he was left fuming by the news that some tournament directors are planning to ask the players to sign an agreement that they will not compete in fund-raising events during the off-season in a return for a reduction in the calendar.

“Now how exactly do tournament directors think that they own our time off,” Roddick posted on twitter. “It's not their decision to make. If a guy wants to wear himself down then it's his risk. They can't have regulations and rules all year and then run our off season as well. My foundation has raised 15 million and would take a serious hit.”