The 22-year-old emerged as the Elland Road club's top attacking target this summer.
However, Leeds are still tracking Lang, and may be tempted to put in an offer in January or next summer.
The young talent has already notched four goals and four assists in ten games this term.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!