i'm sarah mulkerrins, and this is sport today, live from the bbc sport centre.pions league, scoring twice to beat last year's runners—up, juventus. what a game in guangzhou! shangai sneak into the asian champions league semi—finals after going to penalties against evergrande. and we'll be in las vegas, where they are preparing for another huge fight this weekend. hello, and welcome along to the programme. so, the european champions league is back, and there were big wins for barcelona, paris st germain, chelsea, and manchester united on tuesday. 28 goals in eight matches. lionel messi scored two for barcelona in their three nil win at home against last season's runners up, juventus. 0ur football reporter, john bennett, has more. barcelona and lionel messi, superb this evening. a brilliant performance.