Sport's highest court will issue a second verdict this week involving a doping case against a Tour de France winner.

The Court of Arbitration for Sport yesterday announced it will publish a ruling Thursday on an appeal filed by the International Cycling Union to have 1997 Tour de France winner Jan Ullrich investigated for links to Operation Puerto, a 2006 Spanish doping probe.

Ullrich's verdict will come three days after CAS banned Spanish rider Alberto Contador for two years and stripped him of his 2010 Tour de France champion title for doping.

The UCI forced Contador into sport's highest court, and has pursued Ullrich in a case that has stalled for years.

Cycling's governing body challenged the Swiss Olympic committee's decision not to investigate Ullrich, a retired German racer who held a Swiss license.

Ullrich served a six-month ban for using amphetamines in 2002, and a second offense could trigger a life ban from working in cycling.

The CAS ruling Thursday might not end the case. The panel could opt to make a definitive ruling on Ullrich's alleged doping links, or send the case back to the Swiss Olympic committee for a fresh hearing.

Swiss officials said last year they have no authority over Ullrich, who gave up his license in 2006.

The Puerto investigation emerged weeks before the 2006 Tour. Ullrich was suspended from the race and later fired by his German team T-Mobile.

Ullrich was a five-time runner-up in cycling's biggest race. He was denied victory three times by seven-time Tour de France champion Lance Armstrong -- in 2000, '01 and '03.

Ullrich won an Olympic gold medal in the road race at the 2000 Sydney Games. He also took silver in the Olympic time trial, ahead of Armstrong.