Guardiola returned to action the following season and Barcelona once again won La Liga, thanks largely to the performances of Rivaldo and Luís Figo. On 8 June 1998, Guardiola underwent surgery to try to resolve his lingering calf injury, which had caused him to miss the 1998 FIFA World Cup for Spain. A largely disappointing 1999–2000 season again ended in surgery, with Guardiola missing the last three months of the season with a serious ankle injury. Barcelona didn't win any silverware during the 2000–01 season and finished fourth place in the league; nonetheless, they qualified for the Champions League.