Manny Pacquiao is returning to the ring this weekend but it won't be against Errol Spence Jr.
The pair were expected to collide for the WBC and IBF welterweight titles but Spence was forced to pull out after sustaining an eye injury.
The American - undefeated from 27 bouts - suffered a retinal tear to his left eye and has been replaced by Yordenis Ugas who holds the WBA world strap.
Ugas - who was promoted to champion because of Pacquiao's ring inactivity - was due to appear on the undercard of Pacquiao-Spence against Argentine Fabian Maidana.
The Cuban fighter will instead have the chance of a lifetime as he prepares to take on a Pacquiao who has not fought in two years and is now 42 years old.
Most likely: Pacquiao to win on points at 11/10
Long shot: Ugas to win between rounds 7-9 at 28/1
What they have said
"First and foremost, I ask everyone to join me in praying for a complete recovery for Errol Spence Jr," Pacquiao said.
"Thank God his physical examination discovered his eye condition before he suffered any further damage.
"I have agreed to fight Yordenis Ugas on August 21 for the WBA welterweight super championship. The proper way and the only way to win a world title is inside the ring."
"I'm a fighter not only inside of the ring, but outside of the ring I fight for the freedom of my people," Ugas said.
"That's the most important thing to me. I hope everyone fighting for freedom in Cuba is safe and knows that I'll be fighting for them on Saturday."
Pacquiao is the favourite but his age and ring rust could prove a big factor in the outcome of the bout.
Approaching 43, "Pacman" is no spring chicken and Ugas has just one defeat since 2014 to Shawn Porter although it was a highly disputed defeat with many believing Ugas had done enough to win on the scorecards.
If you're feeling in the mood then have a cheeky flutter on Ugas to upset the odds.
When and where is Pacquiao vs Ugas?
The fight will take place on August 21 at the T-Mobile Arena in Las Vegas, Nevada.
What time are the ring walks?
The card starts at 9 pm ET (2 am BST). The main event between Pacquiao and Spence will start at 11.30 pm ET (4.30 am BST).
How can I watch it?
The fight is live and exclusive to Showtime in America while UK and Ireland fans have the pleasure of watching Pacquiao attempt to roll back the years on Sky Sports.
The broadcast will start at 2 am BST in the UK and Ireland on Sky Sports Main Event and Sky Sports Action. Sky subscribers can also watch the fight live on the Sky Go app.
Tale of the tape
Born: December 17, 1978
Height: 5-5 &12;
Reach: 67 inches
Total Fights: 71
Record: 62-7-2 with 39 knockouts
Born: July 14, 1986
Reach: 69 inches
Total fights: 30
Record: 26-4 with 12 knockouts
Full fight card
Manny Pacquiao vs. Yordenis Ugas - (WBA welterweight title)
Robert Guerrero vs. Victor Ortiz - welterweight
Mark Magsayo vs. Julio Ceja - featherweight
Carlos Castro vs. Oscar Escandon - junior featherweight
Frank Martin vs. Ryan Kielczweski - lightweight
Jose Valenzuela vs. Esteban Sanchez - lightweight
Steven Torres vs. Justin Rolfe - heavyweight
Burley Brooks vs. Cameron Rivera - super middleweight
John Dato vs. Angel Contreras - featherweight