By Keith Idec

Their fight was put together just three weeks ago, but Jorge Cota already is tired of listening to Jermell Charlo.

The Mexican veteran expressed his dislike for the former WBC super welterweight champion Friday during a press conference at Mandalay Bay Resort & Casino in Las Vegas.

“I think Jermell is a boxer who talks too much,” Cota said. “He was very serious when we filmed our ‘Face To Face’ show, and I think he’s a guy who doesn’t back it up. He may talk tough today, but it’s only going to be the two of us in the ring on Sunday.”

Houston’s Charlo (31-1, 15 KOs) is consistently listed as a 50-1 favorite over Cota (28-3, 25 KOs) entering their 12-round main event Sunday night at Mandalay Bay Events Center (FOX; 8 p.m. ET/5 p.m. PT). Cota replaced Detroit’s Tony Harrison as Charlo’s opponent June 3 because Harrison suffered an ankle injury that required surgery.

Harrison (28-2, 21 KOs) upset Charlo on December 22 to win the WBC 154-pound championship from him at Barclays Center in Brooklyn. Charlo feels the judges “robbed” him off his title, but Cota feels Harrison earned his 12-round, unanimous-decision win.

“I thought Tony Harrison won against Jermell,” Cota said. “I thought he boxed very intelligently, took Charlo out of his game plan and that allowed him to win.”

The 31-year-old Cota lost his last fight, a 10-round split decision to the Dominican Republic’s Jeison Rosario (19-1-1, 13 KOs) on April 20 at Dignity Health Sports Park in Carson, California. He has been inspired, however, by another Mexican who was a huge underdog after taking a tough fight on short notice.

“Andy Ruiz had a great victory and it motivated me a lot heading into this fight,” Cota said in reference to Ruiz’s upset of former heavyweight champion Anthony Joshua on June 1. “Something similar can happen Sunday with me against Charlo. Ruiz showed the underdog can win, so I hope that Charlo is prepared for Sunday.”

Like Ruiz, Cota didn’t hesitate to accept it when this difficult fight was presented to him.

“They told me three weeks ago about the fight,” Cota said, “and I knew this was a great opportunity that I was going to take advantage of. I’m going to win and then fight for the world title.”

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.