Jose Mourinho has warned Liverpool that they cannot go man-to-man against Barcelona superstar Lionel Messi when the two sides meet in the Champions League semi-final.

The Merseysiders booked their place in the last four of the competition with a comprehensive 6-1 aggregate win over Porto, though the Spanish champions will be a far tougher challenge.

Barca eased past Mourinho’s old club Manchester United in midweek, with Lionel Messi scoring two goals in four frantic minutes to take his tally in Europe to 10 for the season.

The Argentine is the leading scorer in the Champions League and Mourinho says Liverpool will need to build a ‘cage’ to stop him from adding to is tally in two weeks’ time.

‘Messi is having a phenomenal season and now with Juventus and Cristiano Ronaldo outside this fight, he knows also that the golden ball is there waiting for him,’ Mourinho told Russia Today.