TEAM NEWS
Arsenal will be without influential winger Gabriel Martinelli, who sustained a foot injury last week.
David Raya is likely to return in goal after being ineligible to face his parent club Brentford at the weekend.
Takehiro Tomiyasu remains a long-term absentee.
Porto defender Wendell has recovered from a thigh issue suffered in the first leg, while Iran striker Mehdi Taremi might be fit after missing the home fixture in the tie.
MATCH FACTS
- Arsenal have won all three of their Champions League home games this season by an aggregate score of 12-0. They have never won four in a row at home without conceding in the competition.
- Bukayo Saka has both scored and assisted a goal in all three of his Champions League home appearances. The only player to do so in four consecutive home games in the competition is Karim Benzema, during the 2011-12 campaign for Real Madrid.
- Galeno has been involved in eight goals in six Champions League appearances for Porto this season (five goals, three assists), netting the winner against Arsenal in the first leg.
- Porto have only won two of their 22 away games in the knockout stages of the Champions League.
- Arsenal are looking to reach the Champions League quarter-finals for the first time since 2009-10. They have been eliminated from the last 16 more than any other side, including each of their past seven appearances in the competition.
- Porto have progressed from three and been eliminated from three of their previous six Champions League knockout-stage ties in which they have won the first leg. They have never won both legs of a knockout tie in the competition.
