Liverpool sealed their place in the Champions League semi-final with a win in Portugal on Wednesday night courtesy of goals from Sadio Mane, Mohamed Salah, Roberto Firmino and Virgil van Dijk.
Leading 2-0 from the first leg, Jurgen Klopp's men were obvious favourites going into the second leg, but despite this billing, they struggled in the opening exchanges as Sergio Conceicao's team went all out in search of a goal.
Porto were direct with their attacks, peppering Alisson's goal with plenty of shots, all to no avail. In the first half alone Porto had 15 shots but did not find the back of the net.