Follow Mail Sport's live blog of tonight's featured games in the champions league for the latest score, team news and updates as Arsenal travel to Porto and Napoli host Barcelona.
11:51
Sami Mokbel: 'Barring a major upset Arsenal defeat Porto over two legs'
Sami Mokbel, Chief Football Reporter, in Porto:
So it’s 14 years since Arsenal have played in the Champions League quarter final. Tonight they have a great opportunity of making it through to the last eight.
Barring a major upset they’ll defeat Porto over two legs - and then it’s anybody’s ball game.