<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.taasisi inayosihusisha na masuala ya soka ya cies football observatory imetoa utafiti ambao unaonesha wachezaji 100 wenye thamani ya juu kwa sasa ulimwenguni kutoka ligi tano bora ulaya.  <response>: cies football observatory has released a list of 50 most valuable players in world football. 