The Eagles have endured a disastrous start to the season with no points and no goals in three Premier League games to date.
There is already talk the club could decide to axe the Dutchman as boss, despite the fact he only arrived on a three-year deal in June.
De Boer says he is focusing on make sure there is an improvement in the performance when they return to Premier League action at Burnley after the international break and he is hopeful he will have a few new faces on board for the trip to Turf Moor.
“We are looking for players of course,” De Boer said, as reported by Sky Sports.
“But it has to really give quality to us. We will see.
“The club is focusing on the players that maybe we are going to get, and I am focusing on the team to get the right freshness for the Burnley game.”
A defender is understood to be a priority and Mamadou Sakho had been a target after his successful loan stint last season.
De Boer has previously indicated there will be no move for the Frenchman due to Liverpool’s reported £30million asking price, but the former Ajax boss indicated there could potentially be a late move – although that would probably be dependent on the Reds softening their stance before Thursday’s deadline.
“I don’t know,” De Boer said when asked about the possibility of signing Sakho. “We know what kind of impact he had last season. But for now, I can’t say about it.”