The fight, which took place in Las Vegas, ended with the victory of the Cuban in 12 rounds by unanimous decision.
The 42-year-old Pacquiao has 62 victories (39 by knockout) in the professional ring with eight defeats, two fights ended in a draw.
35-year-old Ugas won the 27th victory (12 by KO) with four defeats.
Earlier it was reported that the private jet of the holder of the WBA championship belt in the light welterweight champion Jervonta Davis had an accident on takeoff.