Maintaining your focus on the job at hand is a key element of finding success in what you do.
Any loss of concentration can prove extremely costly - just ask Luis Ortiz.
The Cuban heavyweight went into his fight with Deontay Wilder with a perfect 28-0 record and had acquitted himself well in the early rounds in the biggest fight of his career, where he was challenging the American for the WBC heavyweight title.
However, he let his mind wander for just a second which ended up being all the difference.
World Boxing News reported Ortiz being in a reflective mood as he recalled that fateful moment in March.
"Round seven was definitely an emotional round.
"My biggest mistake was that, once I hurt him with the shot, I was already visualising myself as the WBC heavyweight champion of the world, and as the undisputed champion after knocking out Anthony Joshua. Rookie mistakes.
"All of that flashed before my eyes, and then I obviously punched myself out. But even as I was punching, there are some things that I would have done differently with my shot selection.
"Slowing down my punches, shortening them up, being more precise and not so much throwing the flurry of punches I was using."
Wilder won the bout on a TKO in the 10th round, and while the scorecards from the three judges had the American in front, the closeness of the contest was indicated by the fact that there was just one point separating them (85-84).
While it was the first defeat in Ortiz's professional career, he took a lot of positives out of it and realised he could match it with the very best.
"The more conditioned, and not the better man, won, because Wilder had no answer for me other than the one right hand in the fifth and capitalising on my fatigue in the 10th.
"I would have preferred a more conclusive finish, me being knocked out with birdies fluttering around my head.
"I would rather have Wilder knock my block off and have me knocked out cold. The better man did not win that night in the sense that I got tired. With a rematch opportunity, I can improve conditioning and tweak certain things, here and there, and Wilder will not stand a chance."
Like a good fighter, Ortiz responded strongly in his next fight, stopping Razvan Cojanu in the second round, and there have been some talks that a rematch with Wilder could be on the cards.
If that is to eventuate, Ortiz will be much wiser for his initial experience with the unbeaten American.