Leandro Trossard's fortuitous slice was enough to send Arsenal back to the Premier League summit as the meanest defence in the division kept their sixth consecutive clean sheet away from home.
It was largely dull and ill-tempered at Molineux but Mikel Arteta won't care as his side put a couple of dodgy results behind them to secure the kind of ugly win potential champions sometimes need – with skipper Martin Odegaard adding a late second in added time.
Trossard's swing of the right boot on the stroke of half-time skewed past Jose Sa at an awkward angle for his 14th goal of the season.