Lionel Messi after scoring his second goal and Barcelona's third in the first leg ©AFP/Getty Images Barcelona hold a sizeable advantage as they travel to Anfield looking for a first two-legged victory against Liverpool, which would earn a first UEFA Champions League final appearance since 2015. • Former Liverpool striker Luis Suárez gave Barcelona a first-half lead in the first leg at the Camp Nou, before Lionel Messi struck twice in the final 15 minutes – his first goals against Liverpool – to create a cushion to take to Merseyside. Barcelona have reason to be wary, however, having bowed out of last season's competition despite a first-leg victory by a three-goal margin. • Barcelona are in the UEFA Champions League semi-finals for the first time since winning their fifth European title four seasons ago, although they have won only two of their last five contests at this stage. Liverpool, meanwhile, have reached successive semi-finals but have it all to do