in sport, maria sarapova talks about her failed drug test. ahead of her doping ban. and u.n. is questioning that would see refugees and migrants sent back to turkey, the agency says it is concerned about the face guards in place to protect people after a night of talks the e.u. in turkey reaches a tentative agreement that was the refugee migrants arriving in greece, sent back. and for each syrian refugee returned, a syrian in turkey would be resettled in the e.u. that leaves more than 34,000 refugees trapped in greece, as they try to reach e.u. country. many are in the refugee camp where health workers say 70% of the children are sick. diplomaed it editor reports from geneva. >> the european union has had plans to deal with the crisis before, they have all failed. h is more than 140,000 people have arrived by sea. that going much further than anything tried before for the first time they say those that arrive will be september back. it is controversy, already the refugee agency has expressed concern and questioned it's legality. do you fear that currently the proposal in this

maria sarapova has been suspended as a goodwill ambassador.she failed a drug test, at the awe vailian open in january. she had worked for the u.n. development program for nine years but in a statement, said they would be suspending her role pending the investigation the result of an investigation by the international tennis federation. the russian five time grand slam champion face as four year ban if found guilty. now top nfl official has admitted that there is a link between american football, and the brain disease c.t.e. it is the first time the league has made such a connection between the two. the league's vice president of health and safety was discussing concussion, with the u.s. politician on tuesday. the brain disease is linked to repeated head trauma, with symptoms like memory loss, depression, and glen sha. one searcher found c.t.e. in h the brains of 90 former players including hall of famers. the nfl settled a lawsuit. >> do you think there is a link between football and degenerative brain disorders? >> certainly the number of ret

. >> still ahead, all the sport including rafael nadal speaked out over doping following maria sarapova>> live from london. >> among the rightest minds and sites einstein noless as an inspiration. now efforts are being made to nurture. they say that some research on the continent is overlooked and a lack of cash shouldn't stop students from achieving their potential. >> to the decision in the ocean have an equation. the son of a farmer, and an einstein fellow, one of the brightest mathematicians on the african continent. >> try not to say that there is a universal truth in the camp. >> the african institute of mathematical sciences. top accused determines including nobel hour yets teach those that can't ray ford to go to harvard but are just as write. he grew up in a remote village, with barely enough to eat and no electricity at home, he spent his childhood hungry staring at the sky. and he now studies cross meteorology. believe you me, we have room. more of this. and the ideas come from there. >> just the way it is. >> the african academics behind the school have started the next eins