Photo by Chris Unger/Zuffa LLC via Getty ImagesThe rivalry between Alexa Grasso and Valentina Shevchenko might need a trilogy. Grasso and Shevchenko fought to a split draw (48-47, 47-48, 47-47) on Saturday night in the main event of Noche UFC here at T-Mobile Arena. Due to the result, Grasso will retain the UFC women’s flyweight title. This was an immediate rematch after Grasso beat Shevchenko to win the belt six months ago. The fight went back and forth. Grasso dropped Shevchenko in the second round. Shevchenko nearly finished Grasso in the third round with a mounted guillotine choke. The fight ended with Grasso on Shevchenko’s back landing punches. The card was the UFC’s first celebration of Mexican Independence Day. The heavily Mexican and Mexican-America crowd booed Shevchenko and the result of the bout. Judge Mike Bell had Grasso winning the fifth round, 10-8, which led to the draw. He had Shevchenko winning the first, third and fourth rounds and Grasso winning the second and fifth. Judge Junichiro Kamijo had Grasso winning, with victories in the second, fourth and fifth rounds. Judge Sal D’Amato had Shevchenko winning, with victories in the first, third and fourth rounds. Coming in, ESPN had Shevchenko ranked No. 2 and Grasso at No. 3 in its women’s pound-for-pound rankings. Grasso (16-3-1) is unbeaten in six straight fights, all since moving up to flyweight from strawweight. The 30-year-old Guadalajara native has an 8-3-1 record in the UFC. She was the first UFC champion ever who trained primarily in Mexico, doing her camps in her hometown at Lobo Gym, led by her coach and uncle Francisco “Pancho” Grasso. Shevchenko (23-4-1) had a nine-fight winning streak snapped by Grasso in their last fight. The Kyrgyzstan native, who spent many years living and training in Peru, did most of her training camp in Thailand. Shevchenko, 35, had seven successful title defenses as women’s flyweight champion, the most consecutive title defenses by any woman in UFC history, as well as the most in one division by any woman in UFC history. “Bullet” has the most title wins in UFC women’s flyweight history (8). Round-by-round analysis from ESPN MMA analyst Jeff WagenheimRound 1: Grasso comes out orthodox and Shevchenko aggressively lands kicks and punches on her. Grasso does better after switching to southpaw, and after stuffing a couple of takedown attempts, the champ gets taken to the mat, where Shevchenko briefly tries to set up a choke. 10-9, Shevchenko.Round 2: Grasso drops Shevchenko with a hard right hand, then clinches her against the fence and lands punches and elbows before the ex-champ escapes. Shevchenko gets a much-needed takedown. Shevchenko can’t do any damage, and when she stands, she eats an upkick. 10-9, Grasso (19-19).Round 3: After an exchange of kicks, Shevchenko gets a takedown, then secures a guillotine choke from top position. Grasso defends, but the challenger maintains control, even when Grasso gets on top in the final seconds. 10-9, Shevchenko (29-28, Shevchenko).Round 4: Shevchenko lands several sharp jabs. When she goes for a takedown, Grasso stuffs it, then lands several knees to the head. Shevchenko escapes, giants another takedown, but the round ends with Grasso attempting a leg lock. 10-9, Grasso (38-38).Round 5: Shevchenko’s jabs and counterpunches are keeping Grasso away. When Grasso connects, her punches have more effect, but her strikes are landing only occasionally. It looks like a Shevchenko round and win, but then Grasso gets the takedown, gets her back and lands punch after punch before attempting a choke. 10-9, Grasso (48-47, Grasso).