An early Alexis Sanchez strike is all that separates Benfica and Barcelona at half-time in the Estadio da Luz.

The Chilean gave his side the lead after some neat build-up play gave him half a yard of space inside the penalty area.

The home side could have been level just five minutes later, when Lima was sent through on goal. However, Victor Valdes palmed away his effort.

Barcelona have had plenty of possession, but have not really created many clear-cut chances.