Arsenal vs Barcelona
Arsene Wenger's side have again paid the price for not topping their group by drawing the holders. The Gunners have not made it past the Round of 16 for the past five years and come up against the Catalans' fearsome attacking triumvirate. In Lionel Messi, Neymar and Luis Suarez, Luis Enrique's side have the most potent strike-force on the continent. Their defence shipped just four goals in the group stage, amassing 14 points along the way.

Manchester City vs Dynamo Kiev
On paper this is by far the easiest task for the trio of EPL clubs left in the Champions League, but Sergei Rebrov will be hoping his side can upset the odds. Second in the Ukrainian league, Kiev finished runners-up to Chelsea in Group G, but a win away in Porto shows they are not to be taken lightly. Winger Andriy Yarmolenko is certainly a player who could hurt City, who are looking to get past this stage for the first time.