“I was always interested in the game. At the age of 14, I started travelling with my team’s coach to Porto [in Portugal] to see the Champions League. I also worked as a journalist for [Spanish weekly sports magazine] Don Balon, so I got into interviews and read a lot about football.”
His coach tasked the young player with compiling reports on opposition teams. “Those weren’t very in-depth, but interest in the game from the coach’s perspective grew,” Riveiro told Ilta-Sanomat.
Soon after retiring as a player in his 20s, Riveiro obtained his Uefa A-licence, then started coaching the U-11, U-15 and U-18 teams of Celta Vigo. He seemed set to be the coach of Celta's reserves when he was introduced by Spanish ex-footballer Pablo Couñago to the striker’s former Ipswich Town teammate Shefki Kuqi, coach of Honka.
Riveiro became Kuqi’s assistant in 2014 and while the club survived relegation from the Finnish top flight, financial troubles saw the coaching staff move to second-tier Pallokerho-35, who they got promoted to the Veikkausliiga.
Lack of financial resources saw PK-35 struggle in the top-tier. Riveiro moved to HJK to assist Lehkosuo in 2016, and the pair won two league titles together.