Basel Front Office
Arsene Wenger said he began the process of signing Elneny in December after Francis Coquelin went out injured, but they had been monitoring him for over a year.
Chelsea will again meet PSG, while City draws Barcelona for the second straight season as well.
City needed a win at Roma to advance to the Round of 16.
Liverpool and City will definitely be drawn against one of Real Madrid, Barcelona, Bayern Munich, Benfica, Atletico Madrid or FC Porto, so will likely hope their opponents are Portuguese.
The matches will be played on April 3 and 10th.