WOLVES stayed flying high – thanks to Hawkey.
Nuno’s men recorded their sixth successive win thanks to Leo Bonatini’s early strike.
And that extended their lead at the top of the Championship to four points.
But Wolves needed goal-line technology to give them victory.
And Bonatini will be glad that Hawkeye has been used at this level for the first time this season.
The Brazilian grabbed his 12th goal of the season after Birmingham keeper David Stockdale had made a superb double save.
And when a third shot went in from Bonatini, Brum skipper Michael Morrison looked to have made a spectacular goal line clearance.
But ref Simon Hooper pointed to his watch to signal it was a goal.
The result meant struggling Birmingham stay in the bottom three on goal difference.
And their night was made even worse when ref Hooper sent off Harlee Dean with seven minutes to go for a second yellow after shoving Diogo Jota when the Blues defender brought him down.
Wolves could have added to their total with sub Helder Costa wasting a golden chance.
But a scrappy second half meant they had to be satisfied with one goal – after scoring nine in their previous two games.
Birmingham tried to fight their way back into it in a bad-tempered second half but they rarely troubled the promotion favourites.
Wolves needed just eight minutes to open the scoring after they took advantage of a badly mis-placed pass by Birmingham defender Jonathan Grounds.
Ivan Cavaleiro gratefully collected the ball and his shot was saved by Stockdale who then kept out Diogo Jota.
But his efforts went to waste as Bonatini rifled the ball home.
Defender Marc Roberts was then booked three minutes later as he brought down Jota with a bad challenge that might have earned him more than an 11th minute caution.
Jota was in the wars on what was his 21st birthday as he had to change shirts after coming away from a Lukas Jutkiewicz challenge with a bloodied nose
Cavaleiro then threatened a second when he rode two challenges and produced a shot from edge of the area which Stockdale was equal to.
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Birmingham fans booed their side off at half-time.
Wolves looked cut above Steve Cotterill’s team but Brum did themselves no favours again on the hour when Jota was allowed to dart into the 18 yard box. But Roberts got back to block the Atletico Madrid loan starlet.
But Stockdale stopped Wolves adding to their lead after 64 minutes when sub Helder Costa broke clear and tried to take it around the Blues keeper only to have the ball taken off him.
The game boiled over soon after when Morrison and Albert N’Diaye clashed and squared up to each other with head butts flying in.
Ref Hooper said N’Diaye was the guilty party but only showed a yellow.