Joaquín made his debut for the Spain national team on 13 February 2002 against Portugal, in a 1–1 friendly played in Barcelona. Brilliant club form for Betis saw him get called up for that year's FIFA World Cup, where he appeared twice: in his second match, the quarter-finals against co-hosts South Korea, he was involved in a couple of debatable decisions, including one incident where the linesman raised his flag for a goal kick as Joaquín was crossing a ball to Fernando Morientes, who was denied a golden goal – the argument was that the ball had crossed the line. However, replays showed that it did not; the game then went to penalties, and he was chosen to take his team's fourth attempt – despite carrying an injury – which was blocked by Lee Woon-jae.