Matt Damon has injured himself whilst on set during filming for a new movie set in South Africa.

‘The Human Factor’ is a biopic about the life of former SA president Nelson Mandela, which includes the prestigious event in which the country won the Rugby World Cup.

This milestone came in 1995, just after the first democratic election following the notorious apartheid era, with captain Francois Pienaar leading his team to victory before being presented with the trophy by Mandela.

'Bourne Supremacy' star Damon plays Pienaar in this true story, and despite having received extensive rugby training in preparation for the movie, apparently sprained his leg when he kicked the ground instead of hoofing the ball during filming.

"Matt has undergone months of rugby training for the role, with some famous players, but has had difficulty getting the technique right," explains a source in The Sun.

'The Human Factor' is being directed by Clint Eastwood and set for release in the US in December 2009.