Liverpool enjoyed themselves on Tuesday night as they swept aside Bayer Leverkusen in the Champions League. The Reds came into the game in brilliant form having won each of their three matches in the competition so far. But after winning an unbeaten Bundesliga campaign last season, Leverkusen arguably posed Liverpool’s toughest test yet. Of course, as well as seeing whether the Reds could maintain their 100 per cent record in the Champions League, there was another sideshow at Anfield, too. For the first time in 15 years, Xabi Alonso was back on Merseyside for a competitive fixture. And with A…