The star contributed two assists and a goal of his own to the club's 3-2 win over Union Espanola, which confirms their place in the last eight
The former Villarreal and Barcelona playmaker was on top form in Santiago, leading the Xeneize to a 3-2 victory over their Chilean rivals in Wednesday's second leg-clash. Riquelme set up goals for Juan Insaurralde and Pablo Mouche, and scored himself as the club sealed a 5-4 aggregate victory.
Roman dedicated his performance and the triumph to his young son after the match, explaining that proceedings unfolded exactly how Riquelme Jr. had predicted.
"My little boy told me that I was going to score a goal. Now we can enjoy it, I hope that Agustin is enjoying this moment too," the emotional star told reporters.
"It was a great game. We scored three times away from home, which is not easy. We are happy because we qualified, we won well and our first goal hit them hard.
"Of course everything is tough for us, everyone wants to beat us and we have to defend our club and our football the best way possible. You know it's not easy to score three goals away."
Riquelme also marked a personal achievement, as he drew level with former team-mate Martin Palermo as Boca's top scorer in the Libertadores with Wednesday's strike. The Argentines will face the winner of the tie between Fluminense and Internacional in the next round.