"I am not happy [with transfer dealings] but for me it is a challenge", he told Sky Sports.
He could be set to join the plethora of youngsters out on loan from the Premier League champions, with Ruben Loftus-Cheek, Abraham and Izzy Brown among those doing so in the top flight.
"For me, I'm not totally happy with what we did, but I will try to do my best, working very hard with people at the club to try and improve what we have at the moment". For the players it must be the same. "We must have a game plan and try and stick to it".
But Benitez is unhappy that other Newcastle targets have been missed although he admitted that it has been hard. "It's not what you want, it's what you need".
But while Perez is of interest to Newcastle, Benitez says the club will have to sell players before being able to bring in any more signings. Everything is a little more hard. "We will continue to fight because the truth is that he [Perez] is looking forward to joining us".
"When I chose to stay for me it was a challenge", he said.
Spanish ace Lucas Perez is surplus to requirements following a frustrating season at the Emirates Stadium after signing from Deportivo La Coruna, where he struggled to earn regular opportunities within the Gunners first-team.
"It has been a frustrating summer for him [Benitez]", Shearer said.
Owner Mike Ashley - who had promised Benitez "every last penny" the club generated through promotion and player sales in May - wants to see movement out of St James's Park. I don't know if that has been the case.
Wenger: "Chamberlain is a player on the up"
The north London side have also signed Alexandre Lacazette in a club-record £52m deal from Ligue 1 side Lyon. The 23-year-old has scored 20 times during that time and helped the club lift three FA Cups.
Canadian diplomat in Cuba also suffered hearing loss
President Trump announced a couple of months ago he was rolling back numerous advances with Cuba that Obama had overseen. The State Department says it expelled two Cuban diplomats earlier this year for unspecified incidents starting in 2016.
Cleveland Clinic ranked No. 2
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