Azcárraga, riding Fabio, and Sanchez-Cozar, on board Union de la Nutria, each ended in 48.95sec at Guadalajara Country Club.

The result is the first tie in the history of the FEI World Cup's North American League.

"I actually didn't know what time Alberto had done," said Azcárraga.  

"I was just waiting for the result, and I couldn't see the [scoreboard] whether I was first or second. 

"I just heard a scream from the audience, 'you're tied, you're tied.'"

Fellow Mexican Lorenza O'Farrill was third with Queens Darling as only three combinations progressed to the jump-off.

She collected four penalties and ended in 48.79.

"I liked everything about what my horse [did today]," Sanchez-Cozar said. 

"He was clean and covered the obstacles like I wanted. 

"I didn't ride that fast because Lorenza had a rail. 

"I was just waiting to see the outcome from Gonzalo. 

"I am very happy, it was a good competition, and it's a good position [to be in]." 

The top two Mexican riders from the North American League will earn a spot at the Jumping World Cup final in Las Vegas in April.

Azcárraga and Sanchez-Cozar have both been given 19 points for their shared victory, instead of the usual 20 given to the winner.

Neither had competed before this season so they sit joint 16th in the Western Sub-League standings of the North American League.

They are four points behind the leading Mexican, Everardo Hegewisch Diaz Infante.

American Karl Cook continues to lead in the west on 49 points, while his compatriot Brian Moggre leads the Eastern Sub-League on 56.

The next North American League event will take place in Wellington in the US on February 2.