"The U.K. is a very attractive market and one where we're particularly focused, and we're excited about near-term prospects in Spain, " says John Zillmer, president of Aramark's food and support services group.

FORBES: Another Look

Elsewhere, John Isner won his career title after overcoming Spain's Nicolas Almagro in the final of the U.S. Clay Court Championship.

CNN: Djokovic faces nervous wait over injury

Professor John Fabre, a former president of the British Transplantation Society, said that passing opt-out legislation in Spain was not the reason why the country had achieved a high donation rate.

BBC: Deadline for public to have say on organ donation law