Khvicha Kvaratskhelia and Achraf Hakimi scored in either half for the Champions League winner, which will face the runner-up of Group A in the next round of the competition. 

A rare lapse in concentration from Gianluigi Donnarumma almost presented an opportunity for the Sounders to take a surprise lead, but Jesus Ferreira could only fire over. 

PSG took advantage of that reprieve 10 minutes before half-time when Vitinha's goal-bound strike fortuitously deflected off Kvaratskhelia and into the net. 

Luis Enrique's team doubled the lead in the 66th minute when substitute Bradley Barcola teed up Hakimi to finish just two minutes after being introduced into the action. 

PSG almost grabbed a third late on, but Warren Zaire-Emery's effort was brilliantly cleared off the line by Nouhou Tolo, but it mattered little as they held on for a routine win. 

PSG will be joined in the next round by Botafogo, despite the Brazilian side losing 1-0 to Atletico Madrid in the other Group B encounter. 

Atleti knew it needed to beat Botafogo by three goals to advance, but was only able to find one, which came courtesy of Antoine Griezmann's 87th-minute strike.