Simon Grayson has questioned the bookings which two of his players got in Preston North End’s defeat to Hull City.
The Lilywhites manager felt that the yellow cards for Joe Garner and Calum Woods were both unjust.
Garner was cautioned by referee Fred Graham in the 19th minute for simulation.
He went to ground in the box under the challenge of Moses Odubajo.
In the second half, Woods went into the book for a tackle on Ahmed Elmohamady.
That challenge happened on the touchline in front of the technical area, and led to a exchange of words between Grayson and Hull counterpart Steve Bruce.
Grayson said: “The booking for Joe was strange.
“He tried to do the honest thing and stay on his feet when it would have been a free-kick for us.
“Eventually Joe lost his balance, went down and the referee booked him for diving.
“There were some strange decisions which didn’t help us.
“Calum Woods made a fantastic tackle on the touchline and got booked.
“I was disappointed with one or two of the things which went against us.”
Garner’s booking at the KC Stadium was his third yellow of the campaign, following on from cautions against Rotherham and Ipswich.
John Welsh is also on three, the midfielder’s booking at the weekend against his former club being the one which North End could have little complaint about.
Welsh went into the book for a foul on Chuba Akpom in the 60th minute.
The defeat at Hull brought to an end a busy start to the season which saw North End play seven games in 21 days.
The international break means they do not play again until September 12 when Derby County visit Deepdale.
Grayson intends using the gap in the fixture list to give his players a short breather and get some work done on the training ground.
“We have quite a small squad and a lot of players have played the majority of the games so far,” said Grayson.
“The lads will have a bit of time off and we will get some good work into them on the training pitch.
“We will analyse what we have done in the games so far and make sure we are ready to go against Derby.”
Grayson will not have a full squad of players to work with over the next couple of weeks.
Four players are away on international duty – Bailey Wright, Chris Humphrey, Alan Browne and Jordan Pickford.
It would have been five but a hamstring injury has forced Greg Cunningham to pull out of the Republic of Ireland squad.
Wright has the longest trip, with the centre-half heading home for Australia’s World Cup qualifying clash with Bangladesh in Perth.
The Socceroos then have a second qualifier away to Tajikistan.
Humphrey is in Jamaica’s squad for a World Cup qualifier double-header against Nicaragua.
Midfielder Browne is in the Republic of Ireland Under-21s squad.
Pickford will be back at Deepdale on Thursday night for England Under-21s’ friendly with USA Under-23s.Tickets for that game are £10 for adults and £5 concessions, while PNE season ticket holders get half-price entry.