IBF welterweight champion Brook, 28, was stabbed three times in the leg and also sustained a cut on one arm in the assault in the early hours of Thursday morning, and surgeons in Santa Cruz carried out a "major operation that saved his life", according to a family statement.
The Times reports that the attack took place in the apartment where Brook was staying at around 6am on Thursday, with the boxer staggering to a neighbouring apartment block where he managed to raise the alarm by flinging a chair against a window.
Having lost a huge amount of blood he was rushed to hospital in a critical condition, but is now stable after the operation, with the statement adding that, "Kell is awake and starting his recovery from this horrendous attack."
Police investigating the incident have yet to arrest a suspect, but fear that the perpetrator may have left or attempted to leave the island, and have set up road blocks.
The Times reports that they believe that the attacker may also have been injured in the incident, given the huge amount of blood at the crime scene.
The boxer was on holiday in Tenerife with his partner, who is pregnant with their second child. His parents have flown out to the island to be at his bedside. Manager Eddie Hearn also made the trip and tweeted a picture of Brook sitting up in his hospital bed.
Brook has a perfect 33-0 record since turning professional 10 years ago, and after claiming the welterweight crown was looking forward to a potentially huge domestic superfight against Amir Khan next May - after which he was expected to earn a major match-up against the likes of Floyd Mayweather or Manny Pacquiao.
The incident in Tenerife is, shockingly, the second time in his life that the Sheffield-born fighter has been stabbed.
In 2007, he was treated for wounds in his side and buttocks after an incident at a nightclub in his home city. Thankfully, he was able to return to action just six months later, and fans will be wishing him a similarly speedy and successful recovery this time.
It is the second incident to hit a British boxer in Spain this summer: former European champion Jamie Moore was kneecapped as he was shot five times in Marbella a month ago in what Spanish police believe was a case of mistaken identity.
- Sports & Recreation