"Jake came on the trip and did very well, I've been impressed with him," Redknapp told the club's website. "The lad has showed a terrific attitude.
"Danny Rose has done well, he's got something to offer and the same with Dorian Dervite.
"They've all worked hard and we're just getting fit, that's the priority."
Goals from Robbie Keane, Jermain Defoe and Wilson Palacios secured Friday's success against League Two side Bournemouth.
"It was okay," added Harry. "We changed the team around again at half-time and I thought we did better in the second half.
"We didn't start too well, were a bit sloppy but we looked sharper in the second half. Jermain took his goal well and hit the crossbar, he looked bright."