In a bout where both fighters forever etched their name in history, it was Mira Potkonen who gets the chance to add another chapter. 

The 40-year-old mother of two from Finland becomes the oldest female to both fight and win in the Olympics. It came in an entertaining split decision win over France's Maiva Hamadouche, the reigning IBF junior lightweight titlist who gave the amateurs another try. 

Hamadouche managed to win on one scorecard and pull even on a second, with Potkonen—a 2016 Olympic Bronze medalist in Rio—winning on three cards to advance to the Elite Eight at lightweight.

Both boxers came out throwing heavy leather right out the gate. Potkonen put her superior reach to use, beating Hamadouche to the punch and connecting often with her right hand.

Hamadouche was certainly having her say, getting in body shots and right hands upstairs. However, she was constantly beaten to the punch in a furiously paced opening round awarded to Potkonen on all five scorecards.

Neither fighter relented in round two, picking up right where they left off in the preceding frame. Hamadouche was a little quicker to the draw, effectively tying up on the inside and then sneaking in right hands before Potkonen had a chance to reset. 

The aggressive pace slowly began to take its toll, with the second half of round two featuring several clinches. Potkonen reclaimed momentum, connecting with jabs and straight right hands and then circling away from Hamadouche. 

Sensing she needed to land something dramatic, Hamadouche took the lead in a dramatic round three. Potkonen helped her cause, as he was penalized one point for pulling down on the back of Hamadouche's head. 

Hamadouche couldn't quite make it count, as she was only able to win the round on two of the five cards. 

Potkonen advances to the quarterfinal round and is one win away from at least matching her 2016 Rio run when she won a Bronze medal. She will face number-two seed Yeonji Oh (South Korea) on Friday.

Hamadouche made history of her own, as the first-ever Olympic boxer to also serve as a reigning champion in the pros. The current IBF junior lightweight titlsit—who is 22-1 (18KOs) as a pro—has in the vault a future unification bout with WBO titlist and 2016 U.S. Olympian Mikaela Mayer, with their bout likely to take place later this fall.

Jake Donovan is a senior writer for Twitter: @JakeNDaBox