Rafa Benitez admitted Newcastle United gifted Doncaster Rovers their two goals at the Keepmoat Stadium last night.
Benitez’s side had to come from behind to draw 2-2 against the League Two club.
Isaac Hayden and Ayoze Perez netted in the second half to cancel out two goals from Andy Williams.
Williams scored from the spot after United goalkeeper Matz Sels flattened John Marquis.
And the forward headed past Sels later in the half.
Newcastle manager Benitez made seven changes at the interval, and his team were better after the break.
“Normally you say you have two halves, and in this game it was very clear,” said Benitez.
“In the first half, we didn’t play at the level I was expecting, and we made two mistakes and conceded two goals.
“That gave them some hope that they could get a result. In the second half, we started playing like we wanted to play, passing the ball a little bit better and running behind defenders.
“It was a big difference. We had a lot of chances and their keeper was making some great saves.”
Benitez was frustrated by the mistakes for the goals.
He said: “It was a massive mistake for both goals.
“The good thing is that we can analyse these things now and try to find the reason why, and then the solutions.
“It is a friendly, but the feeling from the second half was much better and that is what we have to do.
“The first half is something that we have to improve for sure.”