The Trotters have long been linked with a move for the 22-year-old Frenchman and are looking to push through a deal before the passing of Wednesday's transfer deadline.
Ngog moved to Anfield in 2008 when former Reds manager Rafa Benitez brought him to the club from Paris Saint-Germain.
He made 38 appearances for Liverpool last season but Kenny Dalglish sees him as surplus to requirements following a busy summer of recruitment.
Meanwhile, Owen Coyle has a contingency plan in hand should much-coveted central defender Gary Cahill depart the Reebok Stadium.
If Cahill does make a dramatic exit, then Coyle has lined up Manchester City's Nedum Onuoha as a replacement.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
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.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
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.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
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.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
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.