Jack Robinson is, slowly but surely, making his way back towards full fitness as he recovers from a serious knee injury.
The former Liverpool man, who was on loan at Huddersfield in the 2014/15 season, suffered the injury with the Terriers and only made his debut against Charlton late last season.
Since then, the full back has suffered a series on niggling injuries that have limited his chances.
“Jack Robinson is getting stronger. He's running at the moment so hopefully very soon he can come into the group,” he said.
“(Returning to his high) standards are not what we're afraid of. He's a very good player so he's an asset. It's trying to get him on the pitch.
“The medical staff are getting it together and really trying to get the right formula for him so that he can play matches because when he's right he's a big asset for the club.
“There aren't concerns about him getting back on the pitch. We have to do things differently with him because he's had a few breakdowns.
“We are sure that he'll come back but we want it sooner rather than later so we must do things a bit different.”
Elsewhere, Jamie Mackie is still some way away from returning from an ankle injury.
Hasselbaink added: “Jamie Mackie needs a bit longer but he's doing really well. He's progressing but he'll be out for a few more weeks.”