Stoke know their fate already, with a clash against Hajduk Split already decided, while Fulham may have to face RNK Split if they can get past Domzale of Slovenia.
The Cottagers won the first leg of their second round clash with Crusaders 3-1 on Thursday while RNK Split were winning their away leg 2-1 to make them favourites to progress.
Hearts will take on either Hungarian side Paksi or Tromso of Norway.
And Dundee United could face Metalurg Skopje of Macedonia or Levski Sofia of Bulgaria if they get through their second round clash.
The Tannadice side have an uphill task, though, having gone down 1-0 to Slask Wroclaw in Poland on Thursday.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.