GettyGOALRonaldo, Griezmann & 20 World Cup 2018 stars who could transfer this summerTransfersWorld CupEgyptCosta RicaIcelandSpainGermanyUruguayDenmarkIranMoroccoSaudi ArabiaAustraliaArgentinaNigeriaMexicoSerbiaCroatiaPortugalRussiaPeruFranceGoal takes a look at a selection of big-name stars performing at the World Cup who could be making a move this summer