. >> yeah, yeah, playing at home in the veg's cup final, playing here against juan martin del potro. and this was a match that went from end to end. nadal in the spanish colors, of course, passionate home crowd in seville on clay. it went to a tie-break, and nadal won it, which mean spain won the davis cup. but this is the crowd at the olympic stadium. >> look at those flags, fantastic. >> but del potro, he actually played very well at one stage, but no one was going to stop nadal. he was like a bull in a bull ring. he was going to win that. >> thanks very much indeed. you're watching "bbc world news." still to come -- the sensational stallion of a stage. "warhorse" becomes a film. scientists in australia have succeeded for the first time in freezing particles from the great barrier reef. warming oceans have caused it to decay. but a team base the in sydney have frozen billions of cells, hoping to save them for the future. duncan kennedy reports. it's the only living thing on earth visible from space. 2,600 kilometers long, the truly great barrier reef. in fact, it's nearly 3,000 ree