"Liverpool are one or two players from the title," Adam, now at Stoke City, told BBC Sport. "[Jurgen Klopp] has added quality to the squad, I still think they could do with another centre-half.
"They have brought Shaqiri in, a good replacement if Mohamed Salah needs a rest. Daniel Sturridge is to come back in - if he stays fit he could be in that team as well.
"The goalkeeper situation was a big problem for them last season. He has seen that problem and got that deal done. [Alisson] is going to be worth six to eight points over the season. It adds a total belief and confidence."
Liverpool last won the English top-flight championship in 1990.