Canelo Alvarez defeated Jaime Munguia by unanimous decision Saturday night at T-Mobile Arena in Las Vegas.

In front of a spirited crowd on Cinco de Mayo weekend, Canelo handed Munguia his first loss in the all-Mexican showdown and defended his unified super middleweight title.

Canelo scored the only knockdown in the 12-round fight, dropping Munguia in the fourth round.

The judges scored it 117-110, 116-111 and 115-112.

Canelo landed 234 punches to 170 punches for Munguia, according to punch stats provided on the broadcast.

Munguia came on strong in the first three rounds, but Alvarez indicated that was not a concern.

“I take my time,’’ Alvarez said. “That’s why I have a lot of experience. Jaime Munguia, he’s a great fighter. He’s strong, he’s smart.

“But you know, I take my time. I have 12 rounds to win the fight. I did really good and I feel proud about it.”

Canelo, 33, improved to 61-2-2 and Munguia, 27, dropped to 43-1.

Canelo Alvarez vs Jaime Munguia round-by-round analysis

Round 1: Munguia stalking. Crowd chanting for Munguia. Now seeing his clear advantage in height and reach. Throws a jab, and another. A few more. Canelo throws a punch, but misses. More jabs from Munguia with boxers at center of the ring. Some chants for Canelo now. Canelo lands a couple of body punches. Manguia coming hard. Canelo digs in with left. Munguia 10, Canelo 9.

Round 2: Canelo and Munguia come out firing. But Munguia looks in charge. Munguia effective with the left jab. And Canelo answers with body shots. Jab, body. Jab, body. Munguia landing combinations. Canelo lands a big right. Munguia comes right back. Unafraid. More than willing to mix it up with Canelo. Munguia 19, Canelo 19.

Round 3: Munguia coming forward with the jab and looking for more. Double left hook lands. But back comes Canelo. Canelo counters with a big right, but Munguia is landing, too. Canelo coming forward. Munguia looks vulnerable when his defense gets loose. But he keeps throwing. A flurry from Munguia in the final seconds. Munguia 29, Canelo 28.

Round 4: Now at the center of the ring. Neither backing away. Munguia unloading punches in barrages. Not all landing, but impressive. Canelo lands a right, Munguia unhurt. Munguia stays aggressive and is eating a few punches as a result. Huge exchange. Canelo drops Munguia with a right uppercut late in the round! But Munguia on his feet and ready to go. Canelo 38, Munguia 37.

Round 5: Munguia the aggressor again. So much for that knockdown. Munguia going back to his jab and Canelo appears ready to unload big punches. Connects. A couple of times. Munguia looks a tad loose or wobbly. Not totally steady. Canelo lands a big left. Munguia starting to take a lot of punishment – but still throwing that jab. Canelo 48, Munguia 46.

Round 6: Canelo swings for the fences with a left hook. Misses. Canelo digging in now with his left hook. Lands to the body and head of Munguia, whose punches appear to have lost their snap. But there’s a combo from Munguia. Has Canelo backed up. Munguia working Canelo’s body, then eats two punches. Crowd chanting for Canelo. Canelo 58, Munguia 55.

Round 7: Canelo in control. Tags Munguia with a fistful of power. Oh, snaps back Munguia’s head. But Munguia is still in there, throwing punches even when they’re coming back at him. Now works Canelo into the corner, but back comes Canelo with fury. Munguia suddenly looking more comfortable again before Canelo lands a flurry. Canelo 68, Munguia 64.

Round 8: Munguia comes out firing jabs and backs up Canelo a bit. Throws a big left hook. Misses, but more accuracy could prove dangerous for Canelo. Here comes Munguia. Crowd chanting for Munguia. Canelo coming on strong now. Canelo 77, Munguia 74.

Round 9: Both fighters aggressive. Munguia throws the jab and a combo. Canelo deflects a lot of those punches. But Munguia coming back hard again, and Canelo fires back. Canelo complains about a low blow. It may have been the second time. Canelo unhappy. Munguia now on the offensive. Has Canelo on the ropes, but Canelo turns the table. Getting wild here in the ninth. Canelo 86, Munguia 84.

Round 10: Canelo throws punches with impressive power. Munguia working on a quarter tank of gas here? Nope, the punches keep coming – but not as powerful as Canelo’s. Nice right by Canelo, and back comes Munguia with a flurry. Canelo 96, Munguia 93.

Round 11: Munguia fires jabs, Canelo returns one of his own. Munguia swings wildly. He won’t go down with a whimper. They’re mixing it up again now. Canelo 106, Munguia 102.

Round 12: Munguia throwing everything he’s got. Back comes Canelo, who’s not playing it conservatively even though he’s clearly ahead on cards. The crowd cries, “Ca-ne-lo! Ca-ne-lo!” Their man looks in control. Canelo lands two huge rights. But Munguia still on his feet. A brutal combo from Canelo, but Munguia still on his feet as the final bell rings. Canelo 116, Munguia 111.