With big changes in their respective corners, former world champions Robert Easter Jr. and Rances Barthelemy will rely on the services of new but familiar head trainers as they clash for the vacant WBA Lightweight Title tomorrow on SHOWTIME (10 p.m. ET/7 p.m. PT) from The Chelsea inside of The Cosmopolitan of Las Vegas.

Robert Easter Sr. is back in his son’s corner as head trainer after Robert Jr. teamed up with Kevin Cunningham in his attempt to unify the division last summer against Mikey Garcia. Cuba’s Barthelemy has enlisted the services of childhood hero Joel Casamayor as his head trainer after working with the former Cuban world champion in an assistant’s role in past fights.

Easter and Barthelemy discuss the impact of these changes and their mindset approaching this must-win matchup in separate SHOWTIME Sports video features that will air tomorrow during the SHOWTIME telecast.

Televised coverage begins at 10 p.m. ET/7 p.m. PT and will also feature former super lightweight champion Viktor Postol taking on France's Mohamed Mimoune in a WBC Super Lightweight Title Eliminator, while rising heavyweight sensation Efe Ajagba looks to remain unbeaten against once-beaten German Michael Wallisch in a 10-round heavyweight attraction.