LE CAP D'AGDE, France (July 14, 2012 ) -- Andre Greipel has won the 13th stage of the Tour de France, giving the German sprinter his third stage victory in this year's race. Britain's Bradley Wiggins retains the yellow jersey, with an overall lead of 2 minutes, 5 seconds.

Tour de France leader Bradley Wiggins says his doctors are strongly discouraging him from publishing his blood passport data because of possible misinterpretations by critics.

Wiggins said after Saturday's 13th stage that "whatever you do with the passport thing is a no-win situation."

Wiggins added he would gladly publish the data but that Team Sky doctors are against it because critics would "scrutinize it and say it's too stable, or it's too up and down, or too this, or too that."

Wiggins leads teammate Christopher Froome by 2 minutes, 5 seconds overall.

The blood passport program registers and charts the blood profile of a rider over lengthy periods of time so that comparisons can be made. It's designed to catch drug cheats without needing to find traces of banned drugs.