The draws have been made and Bayer Leverkusen have been paired against West Ham. Granted, the Hammers may not be enough threat to them but with how they performed in their return leg against Freiburg, they could still make trouble for Xabi Alonso's men but since it's in Germany, maybe they can wreak havoc on David Moyes' boys.
Bayer had so much struggle against underdogs from Qarabag that somehow it's hard to expect that it will be easier for them against West Ham. Though, now their lead in Bundesliga is such big that they can afford to drop points in few games and give priority to Europa league.
Liverpool is big favorite against Atlanta, other two pairs is more difficult to predict, but I would say that Benfica and Milan will go the the semifinal.