Hasselbaink took over at the R’s in November, after the London outfit decided to part ways with former boss Chris Ramsey.
And Sandro has already seen enough in the Dutchman’s managerial technique to suggest he will guide them up the Championship table in the future.
“I feel very strong and happy now, and we’re going to grow with the new coach and his mentality,” he said.
“I’m playing game after game, and I just needed that to get confidence, and if he’s happy with me that helps.”
Hasselbaink has drawn his first three matches in charge of QPR, providing him with a solid platform to build upon.
The R’s first drew 0-0 with Burnley, before they came from two goals down to rescue a point against Brighton & Hove Albion.
In their most recent outing, Hasselbaink’s men had been heading towards victory against Bristol City – but a late strike from Aaron Wilbraham stopped them claiming the three points.
The sequence of draws has extended QPR’s unbeaten streak to five matches and ensured that they have remained in close proximity to the play off spaces.
QPR are currently five points off the top six, with their next match coming against Ipswich Town on Boxing Day.