Leo Messi's potential Barca exit could provoke a transfer market earthquake, as Neymar's did when he went to PSG. Barca are determined to keep Messi but per TMW, Sadio Mane would be willing to sign for them if the Argentine goes.
If Messi forces his way out, Barcelona would need to bring in another top forward. Mane is one of the key players for Jurgen Klopp at Liverpool and has already worked under Ronald Koeman at Southampton.
He negotiated with Real Madrid a while back but Liverpool did not let him leave. His price would be around 120 million euros. Mane has explosive pace and plenty of goal threat, operating on the left wing or as a false nine.