Hull manager Phil Brown has disciplined striker Jozy Altidore after the youngster revealed the reason for his omission from the side on Saturday on Twitter.
The USA striker was left out for the dismal goalless draw with fellow strugglers Portsmouth at the KC Stadium after arriving late and he then compounded the error by revealing all.
Brown was far from happy with the 19-year-old on-loan Villarreal forward, and said: "It's going to cost him a lot of money, unfortunately. That for me is information that stays in house. The reason he wasn't on the bench was our business."
He added: "Jozy was on the bench until 2.10 when I decided to change it.
"It's unacceptable behaviour, full stop. You prepare all week for a matchday, mentally and physically. To ask a player to arrive an hour and a half before a game is not too much to ask is it?"
The Altidore issue and the failure of record signing Jimmy Bullard to make his home debut were the most noteworthy aspects of a dour Barclays Premier League basement scrap.
Bullard had been expected to start after making his return from a nine-month lay-off as a substitute at Hull on Monday, but Brown revealed the £5million midfielder had suffered a shin injury playing for the reserves.
Brown said: "Jimmy took a whack in the game on Tuesday. It was probably an over-zealous lad who was looking for a scalp.
"He had it on his mind Thursday and Friday, and that is the only reason he didn't play any part.
"There have been one or two suggestions it's the knee but the only coincidence is that it's the same leg."