Heavyweight contender Luis Ortiz has been added to the Nov. 12 bill in Monte Carlo that also features two world title fights.
Ortiz (25-0, 22 KOs), 37, will fight American Malik Scott (38-2-1, 13 KOs) for the WBA Inter-Continental belt on the undercard of a strong bill featuring the likes of Jamie McDonnell, Stephen Smith and Martin Murray.
Victory for Ortiz, who signed with British promoter Matchroom Boxing on Saturday, could clear the way for a crack at the regular WBA world heavyweight title, with champion Tyson Fury set to be stripped of the belt.
McDonnell will make a fifth WBA world bantamweight title defence against Liborio Solis while fellow Briton Smith faces WBA world super-featherweight champion Jason Sosa at Salle des Etoiles. McDonnell (28-2-1, 13 KOs), 30, last boxed when he defended his belt with a ninth round stoppage of Mexican Fernando Vargas, who had stepped in at a week's notice in April.
The Doncaster boxer holds the secondary WBA belt and had been ordered to face the WBA 'super' champion Rau'shee Warren (14-1, 4 KOs), from America. Instead, McDonnell will first face Venezuela's Solis (25-4-1, 11 KOs), who was unanimously out-pointed by WBC champion Shinsuke Yamanaka in March.
Smith (24-2, 14 KOs), 31, has landed a second world title shot in a year after suffering a unanimous points defeat to IBF champion Jose Pedraza in April.
It will be American Sosa's first defence of the WBA belt since winning it with a surprise 11th round win over Javier Fortuna in June. Sosa (19-1-4, 15 KOs), 28, from New Jersey, had initially been scheduled to defend his belt against Gervonta Davis (16-0, 15 KOs).
Murray, 34, faces a rematch with Arthur Abraham. The Briton lost a split decision to the German nearly a year ago in a fight for the WBO world super-middleweight title. No belt will be on the line for their second scrap after Abraham, 36, lost the WBO title to Gilberto Ramirez earlier this year. Murray was also beaten in his last fight to George Groves.