#4 Lionel Messi and Luis Suarez.
The most important thing for Barcelona will be in-form Lionel Messi and Luis Suarez. With these two linking up well on top, no team in the world could ever actually catch them. The likeness of Coutinho and Dembele's masterclass will be expected, but if all the four men match their link-up play together, Tottenham will stand no chance to defend FC Barcelona, and if Barcelona plays this tactic in their home ground, expect a disaster game for the Lilywhites being the visitors. Luis Suarez has fitness issues, and Barcelona should be careful and they should bench him for the league match occurring days before the Champions League match just in case to have a fit and fresh Uruguayan who is hungry for goals.