Queens Park Rangers striker Conor Washington has failed to score in any of his first 15 appearances for the London club.
Washington was brought to QPR from Peterborough United in the January transfer window, but he has made a slow start at Loftus Road.
The 23-year-old forward has failed to hit the back of the net in any of his first 15 appearances for Rangers, with the step up to Championship football proving a difficult one.
However, Hasselbaink has faith that Washington will come good for his side, and the Dutch boss says that he is excited to link up with him again over pre-season.
"He's still waiting for his first goal with us but when he gets it he'll get a second and a third, and then I think you will see him rising and playing with confidence," he said.
"We believe in him, we have faith in him and we expect him to be a big hit with us.
"There's a big expectation from us around Conor and I'm looking forward to working with him more.”
Washington went to QPR having scored 15 goals in 16 matches for Peterborough in League One, but his form has slowed down dramatically.
The youngster has been used sparingly throughout his time at Loftus Road so far, and he has made just eight starts.
Washington looks likely to spend his time this summer at Euro 2016, as he is expected to be part of Northern Ireland’s squad.
Washington is set to have a prominent role to play at QPR next term, when he will be competing with the likes of Sebastian Polter for a place in the first-team.