Rafa Benitez says he is "not happy" with Newcastle's transfer business so far this summer as they prepare to make their Premier League return this weekend.
Benitez has made a number of signings, headlined by the £12 million capture of Jacob Murphy from Norwich and Florian Lejeune from Eibar for £8.7m.
But the Newcastle boss says he is frustrated that more has not been done to improve last season's Championship-winning squad ahead of Sunday's opener against Tottenham.
"I am not happy but at the same time for me it's a challenge,'' Benitez told Sky Sports. "I try to do my best.