[2] On 25 August 2007, Plašil signed a four-year deal at La Liga team CA Osasuna for a fee of €2.25 million, to replace the injured Javad Nekounam.

[3] He made his debut on 16 September, replacing Javier García Portillo for the final 19 minutes of a goalless home draw against FC Barcelona.

[7] On 5 October 2008, Plašil was sent off in the first half of a 1–0 home loss to Racing de Santander for handball from Ezequiel Garay's shot, although he missed the penalty kick.

He was selected for UEFA Euro 2004 in Portugal where his team reached the semi-finals; his lone appearance was a 2–1 win that eliminated neighbours Germany on 23 June at the Estádio José Alvalade.

[19] Plašil started all three of the Czechs' group games at the 2006 FIFA World Cup in Germany, their first since partition, where they were eliminated at the expense of eventual champions Italy.

[20] Plašil played 13 times in qualification for UEFA Euro 2008, scoring to cap a 3–0 win over Germany in the Allianz Arena on 17 October 2007 that qualified his team to the finals in Austria and Switzerland; it was Joachim Löw's first defeat as national manager.

[22] Plašil played every minute of the Czech Republic's campaign at UEFA Euro 2012 in Poland and Ukraine, where they were eliminated 1–0 by Portugal in the quarter-finals.