John Cartwright has stated that teenage twin duo Callum Kemp and Lloyd Kemp made the difference for Hull FC in their 16-10 pre-season win at Castleford Tigers.

Both players came on for the entire second half, with Callum lining up at half-back and Lloyd at full-back. They showed some neat temperament on both sides of the ball to help their side grind out the win, with Cartwright even suggesting that the teens inspired the players around them.

The Black and Whites had to dig deep in the second half, with Jed Cartwright and Amir Bourouh's quick-fire double adding to Jordan Rapana's first-half effort. Castleford, who led 10-4 at half-time, rolled the dice late on, but it was Hull, to their credit, who stood firm.

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"They were tremendous," Cartwright told Hull Live when asked about the twins after the game. "They're still academy boys. They were probably the difference in the end to us winning the game. They brought that energy, and it played out through the rest of the team. They kicked really well. Young Logan Moy at full-back was as brave as they come. People will come through the gates in their droves to watch those players.

"I've had the pre-season with them and they are tremendous young kids. They are well mannered and well behaved. Their attention to detail about football is as good as you'll see for some kids that age. They love their football."

Cartwright, who saw his side show plenty of character and resilience in Castleford, continued: "I'm just happy with the way we finished the game. We made a lot of changes at half-time, so I'm really happy for the younger members of the squad who got a chance and who went on to win the game. It's pleasing.

"It's good when the team realises where they came up short (half-time team talk). Castleford played really well in the first 30 minutes. We didn't help our cause by turning the ball over and with some penalties—we gave them a few shots at us, I suppose, whereas they gave us nothing.

"They kicked and chased really well. They turned us around, and they were very aggressive in defence. The players summed it up themselves at half-time, they fixed up those areas, and we played more direct when we had the ball. We tried to get them more fatigued and put them in the same place they did us. They did it really well.

"I really thought with the inexperience we had that they'd get a try there at the end. They had a lot of ball and a lot of field position; they played a lot of football, and they had a lot of offloads, but that's something that can take a while to build, resilience, but they kept turning up for each other."

Those key traits delighted Cartwright, who now begins competitive action with Hull in the Challenge Cup against York Acorn next week.

He explained: "It doesn't matter what the game is; you want to see blokes go out there and want to win, whether they're playing cards or playing a game of pool or having a friendly game. That was the most pleasing thing: that they didn't give up and they wanted to win the game. At the end of the day, there's nothing riding on it, just a bit of pride, and it's created good selection headaches for us coaches to try and pick a best 17 out of it."

Cartwright also provided an update on Ed Chamberlain, who went off injured in the first half, also reaffirming that his son, Jed, is okay. Logan Moy too is fine after a first-half knock.

"Ed has rolled his ankle," Cartwright added. "We're not sure of the severity of it yet. Hopefully he's not too bad, but it was bad enough for him not to go back on.

"Jed is alright. He got a shot on his foot, and it went numb. He got it moving again, and he could have stayed on if he needed to. Logan passed his protocols on the field so he didn't have to come off. It was a heavy hit."