The 20-year-old winger has represented Spain at U19, U20, and U23 level, and is very much regarded as a future star at Camp Nou.
Tello is under contract with the reigning La Liga and Champions League holders until 2014, but that will not stop the Reds from pressing ahead with their plans to lure him to Anfield this summer.
The former Espanyol forward can operate either as a winger, or in a more central attacking role, and fits in with Liverpool's current ideologies of bringing in exciting young talent.
However, Barcelona boss Pep Guardiola will be keen to keep hold of Tello, and after handing him his first-team debut this season, both domestically and in Europe, will hope that the player commits his future to the Catalan club.
Kenny Dalglish has already spent close to £115million on new signings since returning to the Anfield helm just over a year ago, and despite Liverpool's poor showing in the Premier League this season, is expected to have more money available to spend this summer.