Tristar Gym coach Firas Zahabi says former two-division UFC champion Georges St-Pierre will eventually return to the octagon for a big fight and did not rule out Conor McGregor as an opponent.

St-Pierre became just the fourth fighter to win a title in different divisions after he returned from a four-year hiatus to submit Michael Bisping on 4 November at UFC 217 and become the middleweight champion.

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The 36-year-old was expected to unify the titles against Robert Whittaker next, who became the interim middleweight champion back in June.

However, "GSP" did not completely seem on board with the idea as he would later be sidelined indefinitely after being diagnosed with ulcerative colitis, a potentially serious condition.

St-Pierre would eventually vacate the belt just 31 days after winning it at UFC 217 as the combat world was left wondering if he would ever return to the octagon, especially after Dana White claimed he did not want to return to his old welterweight division either.

But, the longtime coach of the French-Canadian, Zahabi, thinks he will return for a big fight as he spoke to TSN: "Hard to say honestly [if he returns to welterweight], hard to say. I think Georges is going to get better, get back in the gym, feel his body out and see what he wants. What's the most interesting, epic fight out there..."

When McGregor was mentioned as a possible opponent, Zahabi did not rule it out. Having previously wanted the Irishman as a potential comeback opponent for St-Pierre before it was eventually Bisping, Zahabi says it would be a mega fight.

"Mega fight," he added. "No doubt about it, Georges will come back for a big, exciting fight."

A fight between the two has long been a dream bout for MMA fans.

St-Pierre claimed in October that it would be an "amazing honour" to fight the UFC lightweight champion in the future, especially if McGregor and the fans wanted it. However, he was not interested in fighting someone in the lower divisions at the time.

As for who would win, "Rush" is an unsurprising 13/10 betting favourite over McGregor. However, some like former UFC women's bantamweight champion Miesha Tate believes the "Notorious" could emerge victorious in a potential super fight.