He spent most of his career in France withMonaco andBordeaux, making 411Ligue 1 appearances. He played 367 total times for the latter, and captained them to victory in the2012–13 Coupe de France. He also played two seasons withOsasuna in Spain and one on loan toCatania in Italy.
Plašil, aged 18, was signed byMonaco in 2000, but in his first two-year spell, he only started 8 matches. He was subsequently loaned toLigue 2 clubCréteil. After a decent performance, Plašil returned to Monaco at the start of the 2003 season and for the next four years he was a regular in the starting team and even enjoyed his finest moment in the 2003–04 season when the principality side reached the final of theUEFA Champions League. In that season, Plašil contributed a goal to Monaco's record-breaking 8–3 defeat ofDeportivo La Coruña.[2]
On 25 August 2007, Plašil signed a four-year deal atLa Liga teamCA Osasuna for a fee of €2.25 million, to replace the injuredJavad Nekounam.[3]
He made his debut on 16 September, replacingJavier García Portillo for the final 19 minutes of a goalless home draw againstFC Barcelona.[4] His first goal for the team fromPamplona came on 2 December, a left-foot volley to open a 2–1 victory atDeportivo de La Coruña.[5] Three days later he got his first goal in theReyno de Navarra Stadium, to begin a 1–1 draw againstSevilla FC.[6] He finished the season with four goals from 35 games, the last being the only one in a win over rivalsReal Zaragoza on 10 February 2008, in first-half added time.[7]
On 5 October 2008, Plašil was sent off in the first half of a 1–0 home loss toRacing de Santander for handball fromEzequiel Garay's shot, although he missed thepenalty kick.[8] He again totalled four goals in 32 games, concluding on 31 May 2009 with an equaliser in a 2–1 home win overReal Madrid.[9]
On 9 June 2009, French championsBordeaux signed Plašil on a four-year deal for an estimated €3 million.[10] He made his debut for Bordeaux when they won the2009 Trophée des Champions.[11]
On 2 September 2013, Plašil signed on loan forSerie A clubCatania.[13] He played 29 times for theSicilians, scoring on 29 September to open a 2–0 win overChievo, their first win of the season.[14]
On 7 June 2017, Plašil extended his contract for one more year.[15] Six months later, he was one of threeGirondins sent off in a 2–1 loss atfourth-tierUS Granville in the last 64 of the cup; he received a five-match ban for dissent.[16]
In his next game on 2 June, he scored his first goal in a 3–1 friendly win overBulgaria. He was selected forUEFA Euro 2004 in Portugal where his team reached the semi-finals; his lone appearance was a 2–1 win that eliminated neighboursGermany on 23 June at theEstádio José Alvalade. He started in whatBBC Sport called an "under-strength" Czech team, making way forKarel Poborský with 20 minutes remaining.[19]
Plašil started all three of the Czechs' group games at the2006 FIFA World Cup in Germany, their first sincepartition, where they were eliminated at the expense of eventual championsItaly.[20] Plašil played 13 times in qualification forUEFA Euro 2008, scoring to cap a 3–0 win over Germany in theAllianz Arena on 17 October 2007 that qualified his team to the finals in Austria and Switzerland; it wasJoachim Löw's first defeat as national manager.[21] In the final tournament, Plašil started each game in Group A and scored to put the Czechs 2–0 up against Turkey in the last game, which they eventually lost 3–2 to be eliminated.[22]
Plašil played every minute of the Czech Republic's campaign atUEFA Euro 2012 in Poland and Ukraine, where they were eliminated 1–0 by Portugal in the quarter-finals. He was called up for his fourth time at the continental championship when he was chosen forUEFA Euro 2016 in France.[23] In a pre-tournament friendly match on 5 June, he earned his100th cap in a 2–1 home friendly loss toSouth Korea.[24] He started all three group matches at the tournament as the Czech national team exited with two losses and a draw.
^Zariquiegui, Fermín (10 February 2008)."Plasil devuelve a la vida a Osasuna" [Plašil brings Osasuna back to life].El Mundo (in Spanish). Retrieved13 June 2016.
^Bougeois, Pierre (31 May 2013)."Bordeaux remporte la Coupe de France !" [Bordeaux win the Coupe de France!] (in French). French Football Federation. Retrieved28 July 2018.