Ka dib guushii Champions League, xilli ciyaareedkii 2014-15 ayaa Casillas dib ugu soo laabtay inuu noqdo goolhayaha koowaad ee kooxda, in kasta oo uu tartan kula jiray imaanshaha cusub ee Keylor Navas, maadaama uu ku guuleystay UEFA Super Cup, iyadoo Real Madrid ay ka adkaatay Sevilla 2-0 bishii Agoosto 12, 2014. Wuxuu sidoo kale ku guuleystay FIFA Club World Cup
Dabayaaqadii isla sanadkaas, wuxuu sameeyay muuqaalkiisii 700aad ee Madrid 20kii Diseembar 2014, finalka FIFA Club World Cup 2014, markii Real Madrid ay ka adkaatay San Lorenzo 2 <unk> 0. Bishii Maajo 2015, Casillas wuxuu ciyaaray semi-finalka Champions League oo uu kula ciyaaray Juventus, halkaas oo kooxdiisa ay ku lumisay 3-2 wadarta guud.