Friday's defeat was "hard to take" for the Wolves boss as they surrendered a lead in controversial fashion to make it six games without a win
Nuno Espirito Santo is convinced Cardiff City's first goal in Wolves' 2-1 defeat on Friday should not have been allowed to stand due to an apparent foul on goalkeeper Rui Patricio.
Cardiff came from behind to take the points in Wales, clawing themselves out of the Premier League's bottom three in the process.
Wolves took an early lead through Matt Doherty, as he smashed in from close range after Neil Etheridge saved Raul Jimenez's header.