Sheffield United produced a courageous performance to earn a first win of the season against Wolves.
Oliver Norwood struck an injury-time penalty to defeat Wolves 2-1.
Fabio Silva was ruled to have fouled George Baldock in the box by VAR as Norwood converted from the spot.
The Blades had been put ahead through Cameron Archer after a superb individual goal.
Jean-Ricner Bellegarde scored an 89th-minute equaliser, before Norwood struck from the spot for the Blades' winner.