Mike Phelan, Hull City’s caretaker manager was impressed with the response from his side in the 2-1 win over Leicester, after losing their lead.
Diomande scored the opener for the tigers in spectacular fashion, only for Mahrez to score the equaliser from the spot in the second half.
Robert Snodgrass eventually secured the three points for Hull, who endured a turbulent pre-season ahead of Saturday’s game.
“I thought the players had it in them, we had to change a lot of things in order to get to this stage,” Phelan told Sky Sports. “It was fingers crossed to make sure we had enough players, but full credit to them.
“When we conceded the goal like we did after half-time you think the floodgates may open, but they carried on and showed great determination and character.
“You have to master the ball, play with confidence and play with character and courage. Everything came out, but it’s one game, roll on the next one.
“It’s not often in the Premier League you have a 0-0 game, you have to score goals, our guys have to learn and learn quickly, it’s difficult for them but they managed to keep going.”
Phelan was named as caretaker boss following Steve Bruce’s decision to step down, but it remains unclear whether he will remain in charge on a permanent basis.
“The situation has not changed. It may change, I don’t know,” he added.
“I was asked to take pre-season, I’ve done that, I was asked to take the game, I’ve done that. Now we are in to the politics, that’s for other people to decide.
“Players may want to come here now, performances changes things.”