Adidas are threatening to end their partnership agreement with cycling team T-Mobile, after their rider Patrik Sinkewitz failed a drugs test, according to Friday's edition of Die Welt.
"We regard this matter very seriously and are considering terminating our partnership (with the T-Mobile team)," Jan Runau, communications director of Adidas, told the German daily newspaper. "The Adidas group has a very clear position against doping in sport."
The sports equipment manufacterers are believed to have a flexible contract with T-Mobile, worth less than one million euros.
Adidas terminated Jan Ullrich's contract when the 1997 Tour de France winner was sacked by T-Mobile a year ago, after he was linked to a high-profile doping scandal in Spain.
Adidas have been linked to the T-Mobile team since 1997 when it first partnered with Telekom, renamed T-Mobile in 2004.