Nuno Espirito Santo admitted Wolves have been lucky to scrape into the FA Cup fifth round as Vitinha's sublime strike sealed a hard-fought 1-0 win against non-league Chorley on Friday.
Nuno's area were fortunate to avoid an embarrassing upset after a lacklustre display in Victory Park.
Vitinha's brilliant long-range travel set Wolves ahead early found in the first half.
But sixth tier Chorley, the previous non-league club standing in this season's competition, pushed Wolves completely and could easily have forced extra-time.
Wolves keeper John Ruddy had to create several good saves before they secured a final 16 tie against Southampton or Arsenal.
"These were well organised. We ought to have transferred the ball more rapidly but a win is a win. These were tough," Nuno said.
"The scene was set for all of us to lose this game. It was difficult to preserve possession. We adapted well to the pitch. It had been very important to everyone we went to another round."
Wolves are winless within their history six Premier League video games and Nuno will hardly have been encouraged a revival is just about the part after their visit to suburban Lancashire.
Nuno made six changes from last weekend's loss to local rivals West Bromwich Albion, but still included famous brands Conor Coady, Joao Moutinho and £35 million pre-season signing Fabio Silva.
Reflecting the big divide between the groups, Chorley captain Scott Set booked the day faraway from his job while a lift engineer to play for the part-timers.
A lot of Leather's team-mates spent your day at the job, including their manager Jamie Vermiglio, who is a primary university headteacher.
Having beaten Wigan, Peterborough and Derby, National Group North Chorley were savoring their finest ever FA Cup run plus they gave Wolves a real scare as well.
"We just said we happen to be disappointed. That says a whole lot. We were exceptional, really disciplined and appeared as if we were likely to score every time we experienced the container," Vermiglio said.
"Credit to your lads. These are in your free time players with regular mentality.
"We have enjoyed every second of it. We have completed ourselves proud. An amazing moment for all those."
Chorley practically snatched the business lead when Harry Cardwell chosen Elliot Newby's come across the Wolves spot and he chested straight down for a low shot that Ruddy smothered.
With homes lining the tiny ground, some locals got a free of charge glimpse of the action from their gardens, while a cardboard cut out of superstar Chorley fan and pop star Adele sat in one of the stands.
Fireworks were let off from one property to encourage Chorley, nonetheless it was Vitinha who exactly provided the pyrotechnics in the 12th minute.
Spending possession 35 yards from goal, Vitinha place his sights and unleashed a ferocious, swerving get that flashed more than startled Chorley keeper Matthew Unwin.
It really is doubtful Unwin faced many photos of that top quality in the National Little league North, but the on-mortgage loan Porto midfielder's first senior target was Wolves' only hit on target in the entire game.
Patrick Cutrone did go close for the visitors with a rising get that just cleared the bar.
Connor Hall, who scored in the initial, second and third rounds for Chorley, threatened an equaliser when his header forced Ruddy to save lots of early in the next half.
Wolves were struggling to keep Chorley at bay and Ruddy had to tip over Andy Halls' header before the plucky underdogs eventually ran out of steam.