 Nyora kuenderera mberi kweiyi ndima - Musi wa 26 Chikunguru 2017, Cahill akagadzwa semutungamiriri wekirabhu yeChelsea pamberi pemwaka wa 2017-18, zvichitevera kuenda kwaJohn Terry. Musi wa12 Nyamavhuvhu 2017, mumutambo wekutanga wemwaka wa2017-18 weChelsea uchirwisa Burnley kuStamford Bridge, Cahill akadzingwa muminiti yegumi nematatu yemutambo nekuda kwekusafunga kwakashata pamutambi wepakati weBurnley Steven Defour, zvichikonzera kutevedzana kwezviitiko zvakaona Chelsea ichitanga kudzivirira zita ravo nekutyisa 32 kukundwa nechikwata cheBurnley icho chakanga changohwina kamwe chete kure nemusha mumwaka wapfuura. Cahill akambomiswa basa pamitambo yeChelsea yekukwikwidza neTottenham Hotspur, Everton neLeicester City. Akatungamira Chelsea kukunda kuWembley Stadium muFA Cup Final ya2018Chikwata chake chinokunda Manchester United 1-0. 