Radoslav Kovac has quit international football with Czech Republic to focus all his attention on helping West Ham survive the drop.
The 30-year-old amassed 30 caps for his country, appearing in the 2006 World Cup and 2008 European Championship along the way.
The midfielder has featured on a regular basis for the Hammers this term making 15 appearances, 11 of them starts in the Premier League.
However Gianfranco Zola's side currently sit perilously close to the relegation places and Kovac wants to put all his effort into helping the club preserve their Premier League status.
"I want to concentrate on the English league," he told the Daily Mail.
"Now at West Ham we have an ambitious project. It has been a long and beautiful experience.
"I've played at the World Cup and the European Championship, winning with the youth team (in the 2002 U21 European Championship).
"I'm over 30 so I decided to quit."