The 35-year-old star has won eight grands prix, including a memorable victory around the iconic streets of Monaco, in what could be considered one of Red Bull's finest moments, and certainly a career highlight for Ricciardo.
In 2024 however, Ricciardo is much further from the top spot on the podium and with his RB contract set to expire at the end of the season, could be looking at a farewell to the sport for good.
Despite being touted as a mid-season replacement for an underperforming Sergio Perez, Ricciardo's hopes of a promotion back into Red Bull's main F1 team look to be thinning by the day.
Reflecting on the pair's glory years with Sky Sports, Horner has now revealed that Ricciardo's time as Sebastian Vettel's team-mate at Red Bull delivered an unwelcome surprise.
Reflecting on fellow Aussie driver Oscar Piastri's recent success with McLaren despite Lando Norris supposedly being their top driver, Horner compared the papaya issuewith his own.
"It was like when Daniel Ricciardo came to us in 2014," the Red Bull chief explained.
"He was clearly meant to be the number two to Sebastian Vettel and he won three races that year to Sebastian's none.