In his column for liverpoolfc.tv, Borrell wrote: "As a former Barca man I was particularly proud to see them put their great rivals to the sword in the El Clasico on Monday night, not least because I actually played a part in the development of some of those players.
"I had the privilege of working with Lionel Messi, Andres Iniesta, Gerard Pique and Bojan Krkic during my 14 years with the Catalan side's youth system and I was pleased for the lad who came on and scored the fifth of the night.
"It was a great moment for him to come off the bench and make that contribution. Hopefully he can keep making that type of impact for them.
"I think it was a special performance from Pep Guardiola's side. Just look at the opponents they overwhelmed. They had the likes of Xabi Alonso and Ronaldo in their side but you'd have to agree the Catalans won at a canter."