'The Tricky Trees' initially went ahead with 20 minutes on the clock as Lichaj found the net, only for Per Mertesacker to level things just three minutes later.
The home fans needn't have worried though, as right-back Lichaj restored Forest's lead a minute before half time with a fine volley.
Mertesacker could only head a cross clear as far as the American, who took a touch before volleying past David Ospina and into the top corner with the outside of his right foot.
Such was the quality of the goal that we could be talking about it for some time to come.
Check out the strike for yourself below:
Lichaj with an AMAZING goal against Arsenal. Wow! pic.twitter.com/8PrwrrbJIP
— Ryan Murton (@ryan_murton) 7 January 2018