Andrew Flintoff's worrying injuries only hit a snag with Deep Vein Thrombosis.

DVT is usually a condition associated with travelling long hours flying. But Flintoff has been diagnosed as suffering from a blood clot following surgery on his knee.
Although the treatment is likely to be less scary than imagined, it will mean Flintoff will need to overcome more problems than he had earlier anticipated, raising fears about a possible inability to return to the England team.
Future Uncertain, Flintoff and Ponting May Lend Voice