Gervonta "Tank" Davis continues his march toward superstardom when he headlines the Showtime pay-per-view card against late replacement Isaac Cruz in defense of his WBA "regular" title at 135 pounds. Gervonta "Tank" Davis continues his march toward superstardom when he headlines the Showtime pay-per-view card against late replacement Isaac Cruz in defense of his WBA "regular" title at 135 pounds. Gervonta "Tank" Davis continues his march toward superstardom when he headlines the Showtime pay-per-view card against late replacement Isaac Cruz in defense of his WBA "regular" title at 135 pounds. Gervonta "Tank" Davis continues his march toward superstardom when he headlines the Showtime pay-per-view card against late replacement Isaac Cruz in defense of his WBA "regular" title at 135 pounds.