Barcelona will look to knock the wind out of Inter's sails when the teams meet at the Estadi Olímpic Lluís Companys to kick off their UEFA Champions League semi-final. UEFA.com previews all the action ahead of the first leg on Wednesday 30 April. Kick-off time is 21:00 CET.

How does it work?Thirty-six sides entered into the new "league phase" and now just four remain with a month-and-a-half to go in the UCL campaign.Barcelona, Paris Saint-Germain, Arsenal, and Inter Milan are through to the semifinals,