Getty ImagesMark DoyleFrom Barcelona to Mourinho: The 10 biggest disappointments of the Champions League in 2017-18Champions LeagueBayern MunichReal MadridOpinionBarcelonaManchester UnitedJuventusManchester CitySSC NapoliChelseaRomaLiverpoolAhead of Saturday's final between Real Madrid and Liverpool in Kiev, Goal looks back at the most disappointing aspects of this season's tournament