Dillian Whyte is under the microscope again because of a drug test.
The interim WBC heavyweight champion tested positive for a banned substance before his unanimous decision win over Oscar Rivas last weekend, according to BoxingScene.com.
The test was administered by UK Anti-Doping (UKAD).
Whyte’s camp and the British Boxing Board of Control were reportedly notified of the test before the bout but the BBBC elected to let it go on as scheduled.
No official announcement of a failed test has been made.
Whyte (26-1-0, 18 knockouts) has the opportunity to appeal, which is a process that can take up to a year.
The interim title holder defeated Rivas 115-112, 115-112, 116-111, despite getting knocked down in the ninth round at the O2 Arena in London.
This is the second time Whyte has allegedly tested positive for a banned substance.
In 2012, Whyte was given a two-year ban for testing positive for methylhexaneamine. He insisted he did not knowingly injest the drug.
Whyte, 31, is one of the top heavyweight fighters in the world having matched up with Anthony Joshua, Joseph Parker and Dereck Chisora in his career.