. >>> now 14-time grand slam winner raphael nadal insists he is a clean athlete following maria sharapova's failed doping test. nadal has experimented with stem

. >>> still to come on the program, raphael nadal avoids a huge upset. >>> on the plains of west africa giraffes were a common sight before drought and poaching decimated their numbers. 20 years ago conservationists in niger launched a campaign to save them, but growing conflict in the region is posing a new threat as we have the report. >>> on the lookout for west africa's last giraffes, this is the last natural reserves in the capital. the african savannah stretched out as as far as the eye could see, but soon a herd showing up in the distance grazing on their favorite trees. there was a time when there were many, but the drought and hunting reduced them to a small group found in niger. authorities here try to protect what remains of the endangered subspecies. this is part of the result. >> translator: in 1996 we had just 50 giraffes. now as we speak we have 452 giraffes. >> reporter: we tried to get a closer look, but as we approach we're told not to disturb them. the giraffe that you can see behind me is not the biggest one in this park. the biggest one is called cido. it's very fam

. >>> now 14-time grand slam winner raphael nadal insists he is a clean athlete following maria sharapova'sdoping test. nadal has experimented with stem cell theory to overcome a knee injury, but argues he has never broken the rules. >> i really don't know nothing about doping. i'm a completely clean guy. and when i get the injury, i get the injury. i never take nothing to be back quicker. i believe in the -- in the sport, and in the values of the sport. >>> pakistan's government has sent india an ultimate tum over their team's participation in the tournament. they say they will only take part if they can make a guarantee that they will be safe. pakistan's first game is scheduled for next wednesday. >> translator: the indian government must give a guarantee of fool-proof security, and if that guarantee is not there, then despite the fact that the pakistani public, the pakistani government, and every pakistani wants the team to go to india, if that guarantee is not given, then the pakistan team will not be given permission to go. >> the preliminary phase of the event is well underway, and zi

he lady player i'd i go down every -- every night on my knees and thank god roger feather are raphael nadalaudible). >> wow! >> federer came on, the last 10s years or so, but there was a good -- there was good stretchso of time the only tennis peoplesl paying attention to were the the williams sisters and martina link cuss an lot great femaleatl players that came through. throu you can't draw the line ofdraw e distinction there.dist you have to give them all cred credit. >> yeah. it sounds -- it's sexist whenex you hear that.u heart. >> yes.es. >> it's 2016, man. >> there's something -- you canc think some things.sohi don't need to say it.t to >> not at all. at to get underway one littlee litl league in california iss reminding overbearing parents tt just chillax. chi take a look at this. thi pretty fine much it's true. it'u it reads, reminders from yourroy child. one, i'm just a kid.. two, it's just a game. three, my coach is a volunteer. four, the officials are humansas and five, no college scholarships will be handed howh the today.th that's the key.ey it's just -- it's crazy to me you s

lady player i would go down every night on my knees and thank god that roger federer and raphael in a de rafael nadal was born. >> the statements were called disappointing and alarming. djokovic denounced those words but followed up saying: the argument of equal play in tennis and in other professional sport is isn't new. some say that women tennis players should be paid less because they play fewer games. it's the best of three sets as opposed to the set of five for men. but women's games can last just as long and attract more viewers 37 serena williams said that matches for women's players often sell out even before the mens. >> yeah, i'm totally surprised especially when me and the other women on the tour have done well, and he we've sold out before the men. >> tennis is one of the few sports where the major tournaments offer equal prize money for men and women. but even then the salary of most male athletes far outstrip the female counterparts. the top ten earners were all men. >> ten years ago software developer in the u.s. sent a message that changed the way that millions around the world commu