Amanda Nunes retains title with TKO of Ronda Rousey

Amanda Nunes, right, forced a first-round TKO of Ronda Rousey while defending her UFC bantamweight title Friday night. AP Photo/John Locher

Forty-eight seconds.

That's all the time Ronda Rousey got in her return to the Octagon before Amanda Nunes forced a first-round TKO on Friday night. The 48-second fight was the fastest any fighter has managed to knock out Rousey.

Nunes retains the title

With the victory, Nunes improved to 14-4 overall (7-1 in UFC) while defending the UFC bantamweight title she won from Miesha Tate at UFC 200. This was Nunes' 10th career victory by knockout, and she is now riding a five-fight win streak dating back to March 2015.

Nunes has recorded 11 of her 14 wins in the first round (six in UFC, most in women's bantamweight division history). Nunes out-landed Rousey 27-7, according to FightMetric, landing 27 of 47 strikes (57 percent) compared to 7 of 14 (50 percent) for Rousey. Twenty-three of Nunes' 27 landed strikes were to the head of Rousey (85 percent).

The fight continued a trend in the women's bantamweight division. All 10 women's bantamweight title fights in UFC history have ended in a finish (five by knockout, five by submission).

Rousey falters in return

Rousey's loss at UFC 207 is the quickest knockout defeat of her career. She was knocked out by Holly Holm in the second round of their fight at UFC 193, the last fight she participated in before Friday night.

Friday's fight is the continuation of a downward trend in Rousey's career. According to FightMetric, most of her core numbers have dropped off over her past six fights.

In the first six fights of her career, Rousey had 12 takedowns in 17 attempts while earning six submission wins on nine submission attempts.

In her past six fights, Rousey has just one takedown on two attempts while successfully completing just one submission attempt.

Rousey also lost the battle of strikes in her past two fights. In her fights against Holm and Nunes, she was out-struck by 38. In her first six UFC fights, she out-struck her opponents by 42.