Two dozen teams qualified from the group stages of football's Europa League on Thursday.
They will be joined in a draw in Switzerland on Monday by eight sides dropping down from the Champions League.
One of two pots will hold the 12 teams that won their Europa groups and the four best sides from the Champions League, who will be drawn against the remaining clubs.
Teams will not be allowed to face opponents from the same country in the round of 32.
Two legged ties will be played on Feb. 15 and 22.
The seeded teams are AC Milan, Arsenal, Atalanta, Athletic Bilbao, Atletico Madrid, Braga, CSKA Moscow, Dynamo Kyiv, Lazio, RB Leipzig, Lokomotiv Moscow, Viktoria Plzen, Salzburg, Sporting Lisbon, Villarreal, Zenit St. Petersburg.
The unseeded teams are AEK Athens, Astana, Celtic, Red Star Belgrade, Borussia Dortmund, Steaua Bucharest, FC Copenhagen, Ludogorets, Lyon, Marseille, Napoli, Nice, Ostersunds FK, Partizan Belgrade, Real Sociedad, Spartak Moscow.
