UFC Lightweight Champion Conor McGregor has not appeared in the Octagon since defeating Eddie Alvarez to win the title at UFC 205.

Khabib Nurmagomedov has long been considered a top threat to McGregor’s title reign, recently defeating Edson Barboza by decision at UFC 219.

McGregor also boxed Floyd Mayweather in his professional boxing debut this past August, suffering a tenth round TKO loss.

The Irishman started off the new year by going to Twitter to take shots at both Nurmagomedov and Mayweather:

2018 could see the UFC Lightweight Champion defend the title for the first time in his career, as the title holder recently hinted to TMZ that a return to the UFC could be in the future.