Earlier today, several news outlets reported that UFC legend Georges St-Pierre plans to announce his retirement on Thursday at a news conference in Montreal. 

St-Pierre, who boasts an all-time record of 26-2, has not fought since 2017 but was hoping to challenge undefeated lightweight champion Khabib Nurmagomedov for the chance to become the first-ever three-division champion in UFC history.

UFC President Dana White hasn't appeared interested in booking that fight, but Khabib is certainly game.

(Vasily Maximov/AFP/Getty Images) 

Moments after GSP's retirement plans surfaced, Nurmagomedov issued a challenge, saying he'll do the fight at 155 or 160 pounds in Montreal, Moscow, New York City or Abu Dhabi.

Khabib's instagram caption reads:

"Let’s do it in November. After this fight you can retire. I grow up on your fights, and have nothing but respect for you, and I believe showed that to you George when you were in Moscow. But, it would be honor for me to share Octagon with one of the greatest fighters of all time. Let’s do it 155 lbs, or I give away 5lbs to you, cause you newer done 155. Well, it’s your choice 155 or 160, Montreal, NYC, Moscow or Abu Dhabi. Send me location my Friend 📍#GSPvsKHABIB #ufc #mma #history#RUSSIAvsCANADA"

Khabib is currently serving a nine-month suspension from the Nevada State Athletic Commission, as a result of his actions in the post-fight melee at UFC 229 last October. 

St-Pierre's last fight came at Madison Square Garden at UFC 217 in November 2017, when he defeated Michael Bisping by way of submission in Round 3 to win the Middleweight title. The memorable victory came four years after GSP walked away from the sport, following a split-decision win over Johnny Hendricks.