The Chilean forward aims to follow in the footsteps of the Brazil legend and is eager to guide Barcelona to silverware
The 37-year-old enjoyed a successful one-season spell at Barcelona in 1996-97 as he netted 34 goals in 37 La Liga appearances, while also winning the Copa del Rey, Supercopa de Espana and Cup Winners' Cup with the Catalans.
And Alexis is keen to follow in the footsteps of his idol.
"They told me the numbers that were available at Barca when I came here. As I am a great admirer of the Brazilian Ronaldo, I wanted to wear the same number," Alexis was quoted as saying on the official Barcelona website.
"He wore number 9 here and was very successful, so I wanted to emulate him."
The Chile international then went on to explain that he has had to change his style of play since joining Barca from Udinese in the summer of 2011.
He added: "Before I used to be more physical, but now I have to be more technical."
The 25-year-old has been a key figure for Barcelona this season, scoring 15 goals in 21 league games so far.