Tour de France rocked by new high profile positive tests

This coming after rumors involving sixth-place overall finisher Frank Schleck, has put even more doubt about this year's Tour.

Two Tour de France stage winners have tested positive for an advanced blood doping product.

Italy's Leonardo Piepoli and Germany's Stefan Schumacher (25th overall, winner of 2 stages, and wore the yellow jesrsey for a few days) tested positive for Continuous Erythropoiesis Receptor Activator (Cera).

Italy's Riccardo Ricco has already admitted to using Cera, a version of the blood booster erythropoietin (EPO).
Between them the three riders won five stages during the July race - or about a quarter of the 21 stages.

The French Anti-Doping Agency has been retesting blood samples from the race in a bid to catch more cyclists they suspect may have used Cera.

The German cycling federation (BDR) is set to take disciplinary action against Schumacher following his positive test and he could face a two-year ban. Schumacher has been suspended by his team Gerolsteiner.