What is 2017–18 UEFA Champions League?
{{Infobox international football competition | tourney_name = UEFA Champions League | year = 2017–18 | image = | size = 275 | caption = The [[Olimpiyskiy National Sports Complex|NSC Olimpiyskiy Stadium]] in [[Kiev]] hosted the final | dates = ''Qualifying:''<br />27 June – 23 August 2017<br />''Competition proper:''<br />12 September 2017 – 26 May 2018 | num_teams = ''Competition proper:'' 32<br />''Total:'' 79 | associations = 54 | champion_other = {{flagicon|ESP}} [[Real Madrid C.F.|Real Madrid]] | count = 13 | second_other = {{flagicon|ENG}} [[Liverpool F.C.|Liverpool]] | matches = 125<!--Starting from group stage, exclude qualifying rounds and play-off round--> | goals = 401<!--Starting from group stage, exclude qualifying rounds and play-off round--> | attendance = {{#expr: <!--Group A-->+ 38323 + 73854 + 34111 + 29073 + 27996 + 57684 + 33303 + 74437 + 27709 + 36000 + 22470 + 74669 <!--Group B-->+ 70000 + 57562 + 46252 + 19898 + 19108 + 70000 + 46403 + 58269 + 19753 + 46288 + 70000 + 57931 <!--Group C-->+ 41150 + 36064 + 67200 + 60643 + 47923 + 41105 + 55893 + 55036 + 67100 + 56253 + 40875 + 34258 <!--Group D-->+ 78656 + 30168 + 48575 + 33460 + 36288 + 55026 + 48442 + 31600 + 40876 + 42528 + 48336 + 29567 <!--Group E-->+ 12566 + 52332 + 34705 + 43376 + 44307 + 12506 + 38002 + 47957 + 42920 + 39495 + 11976 + 48779 <!--Group F-->+ 43500 + 32679 + 22577 + 45310 + 48520 + 43500 + 44483 + 24570 + 43548 + 10573 + 36500 + 33154 <!--Group G-->+ 40068 + 42429 + 36641 + 11703 + 7403 + 41496 + 39346 + 41616 + 36919 + 9029 + 42558 + 42509 <!--Group H-->+ 71060 + 67343 + 65849 + 16324 + 15604 + 76589 + 64500 + 83782 + 19705 + 65849 + 73323 + 42679 <!--Round of 16 1st leg-->+ 41232 + 36000 + 47718 + 39725 + 78158 + 35124 + 37741 + 70000 <!--Round of 16 2nd leg-->+ 84010 + 49411 + 48768 + 74909 + 46585 + 47693 + 97183 + 36885 <!--Quarter-finals 1st leg-->+ 90106 + 40635 + 40849 + 50685 <!--Quarter-finals 2nd leg-->+ 56580 + 70000 + 75796 +