The report claims that the Baggies are scouting the £5 million-rated midfield enforcer with boss Tony Pulis looking to see how he has developed over the summer before making a bid.
Billing, 20, joined Huddersfield in 2013 after making the switch from his native Denmark, and soon impressed the club’s youth team coaches during matches for both the U18s and the U21 side.
He broke in to the Terriers’ first-team set-up largely since the start of the New Year, making a total of 13 Championship appearances and scoring his first senior goal in a 2-0 win at Nottingham Forest.
His big 6ft 5inch frame allows him to dominate the midfield with his height and strength, while on the ball he is comfortable and a powerful runner which often sees him make telling bursts forward.
The West Midlands club have one of the oldest squads in the Premier League, and their lack of emerging talent aside from Saido Berahino has left some questioning their future prospects.
Billing was also said to be watched by Tottenham Hotpsur last term, but the report goes on to say that Spurs ended up being frustrated by boss David Wagner’s inconsistent team selection which often saw the midfielder left out.